Sony Xperia E4g White Paper
White paper
February 2015
XperiaTM E4g
E2003/ E2006/ E2053
White paper | Xperia™ E4g
Purpose of this document
Sony Mobile Communications product White papers are intended to give an overview of a product and
provide details in relevant areas of technology.
NOTE: The illustration that appears on the title page is for reference only. All screen images and elements
are subject to change without prior notice.
Document history
Version
February 2015
First released version
Version 1
Sony Mobile Developer World
For the latest technical documentation and development tools, go to www.sonymobile.com/developer.
This document is published by Sony Mobile
Communications Inc., without any warranty*.
Improvements and changes to this text
necessitated by typographical errors,
inaccuracies of current information or
improvements to programs and/or equipment
may be made by Sony Mobile Communications
Inc. at any time and without notice. Such
changes will, however, be incorporated into new
editions of this document. Printed versions are to
be regarded as temporary reference copies only.
This White paper is published by:
Sony Mobile Communications Inc.,
1-8-15 Konan, Minato-ku, Tokyo108-0075, Japan
www.sonymobile.com
© Sony Mobile Communications Inc., 2009-2015.
All rights reserved. You are hereby granted a
license to download and/or print a copy of this
document.
Any rights not expressly granted herein are
reserved.
*All implied warranties, including without
limitation the implied warranties of
merchantability or fitness for a particular
purpose, are excluded. In no event shall Sony or
its licensors be liable for incidental or
consequential damages of any nature, including
but not limited to lost profits or commercial loss,
arising out of the use of the information in this
document.
First released version (2015)
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Table of contents
Product overview ..........................................................................................................2
Highlights ...............................................................................................................2
Product Specifications ..........................................................................................3
Categorised feature list ..........................................................................................6
Technologies in detail ...................................................................................................9
Device-to-device communications (local) .............................................................9
Bluetooth® wireless technology .........................................................................9
Wi-Fi® ...............................................................................................................10
DLNA Certified® (Digital Living Network Alliance) ............................................11
Messaging ...........................................................................................................12
MMS (Multimedia Messaging Service)..............................................................12
Email .................................................................................................................12
Positioning – location based services .................................................................13
Provisioning (OMA CP) ........................................................................................13
Multimedia (audio, image and video) ...................................................................14
Synchronisation (OMA DS, EAS, Google Sync™) ...............................................15
Web browser .......................................................................................................15
Memory in Android™ devices .............................................................................16
Trademarks and acknowledgements ..................................................................20
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Product overview
Highlights
•
•
•
•
4G speed
Long-lasting battery and Battery STAMINA mode
High quality images and video: 5 MP camera with HD 1080p video
Ultra fast performance: MediaTek MT6732 Quad-Core 1.5 Ghz processor and 1 GB of RAM
The speed with 4G
Enjoy the fastest news and information downloads, find your way using maps, check and send email,
send pictures to friends and family in seconds, and make the most of trouble-free online music streaming
on the go.
Superior battery
If you lead a busy family and professional life, you will enjoy an impressive 2-day battery life (under normal
usage conditions) even when you don't activate the extra power-saving options. You can talk, email, text,
navigate or do anything else you usually do with your smartphone as you move through your day.
Switch on STAMINA mode and see by how much you just extended your battery life. Battery STAMINA
mode optimises how your battery is used. When you’re not using the display, apps and functions that
work in the background get turned off, but you’ll still receive calls, texts, alarms and your choice of app
notifications. To get everything up and running again, just press the power key.
A camera that thinks for you
Whether you're trying to capture special family moments or reunions with friends, the Xperia™ E4g dual
will make your pictures great. Featuring a 5 MP main camera with autofocus and flash as well as a 2 MP
front camera, the device is packed with Sony camera technology and has a wide range of optional image
enhancing apps built in. Autoscene Recognition technology senses the visual atmosphere, recognises 52
different scenes, and then selects the ideal settings automatically to give you the best possible picture of
where you are.
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Product Specifications
Operating system
Google™ Android™ 4.4.4 (KitKat)
Processor
1.5 GHz MediaTek MT6732 Quad-core
GPU
ARM Mali-760 MP2
Size
133 x 71 x 10.8 mm
Weight
135 grams
Available colours
Black, White
Main screen
Colours
16,777,216 colour TFT
Resolution
540x960 pixels
Size (diagonal)
4.7 inches
Scratch-resistant
Yes - Durable tempered glass
Input mechanisms
Text input
On-screen QWERTY keyboard, 12-key input
Touch screen
Capacitive
Touch gesture
Yes – multi-touch, up to 4 fingers supported
Handwriting recognition
Yes
Memory
RAM
1 GB
Flash memory
Up to 8 GB*
Expansion slot
microSD™ card, up to 32 GB
Speed class of MicroSD™
10**
Camera
Camera resolution
5 MP
Smooth zoom
4x
Video recording
Yes – HD 1080p
Front Camera
Yes – HD 720p for video chat and 2 MP for camera capture
Sensors
Accelerometer
Yes
Ambient light sensor
Yes
Proximity sensor
Yes
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Networks
E2003
UMTS HSPA+ 900 (Band VIII), 850 (Band V), 1900 (Band II),
2100 (Band I) MHz
GSM GPRS/EDGE 850, 900, 1800, 1900 MHz
LTE Bands 1, 2, 3, 5, 7, 8, 20
E2006
UMTS HSPA+ 850 (Band V), 1700 (Band IV), 1900 (Band II),
2100 (Band I) MHz
GSM GPRS/EDGE 850, 900, 1800, 1900 MHz
LTE Bands 2, 4, 5, 7, 12, 13, 17
E2053
UMTS HSPA+ 850 (Band V), 900 (Band VIII), 1700 (Band IV),
1900 (Band II), 2100 (Band I) MHz
GSM GPRS/EDGE 850, 900, 1800, 1900 MHz
LTE Bands 1, 2, 3, 4, 5, 7, 8, 28
Data transfer speeds
GSM GPRS
(upload and download)
Up to 85.6 kbps
GSM EDGE
(upload and download)
Up to 237 kbps
UMTS HSUPA (upload)
Cat. 6, up to 5.76 Mbps
UMTS HSDPA (download)
Cat. 24, up to 42.2 Mbps
LTE (upload)
Cat. 4, up to 50 Mbps
LTE (download)
Cat. 4, up to 150 Mbps
Battery performance
Talk time (GSM)
Up to 12 hours 11 min.***
Standby time (GSM)
Up to 696 hours***
Talk time (UMTS)
Up to 12 hours 42 min.***
Standby time (UMTS)
Up to 653 hours***
Standby time (LTE)
Up to 572 hours***
Music listening time
Up to 48 hours 24 min.***
Video playback time
Up to 6 hours 24 min.***
Battery (Embedded)
2300 mAh, minimum
* Memory comprises approximately 2.5 GB of firmware, plus 4.8 GB of “Internal Storage” for music, pictures and movies, and downloaded applications and their data. For more details about memory, see
“Memory in Android™ devices” on page 16.
** The minimum hardware requirement (high speed mode) for Speed Class 10 is met by your Xperia™
model. It is up to the relevant application, not the device, to meet the conditions needed to take full advantage of the speed class definition. If you would like to know more about your memory card, refer to the
specification information that came with the card.
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*** Values are according to the GSM Association Battery Life Measurement Technique as performed in
controlled laboratory conditions. Actual time may vary.
NOTE: Battery performance may vary depending on network conditions and configurations, and device
usage.
NOTE: Performance metrics are measured under laboratory conditions.
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Categorised feature list
Camera
Music
Search
5 MP camera
4x smooth zoom
Auto scene recognition
AR Effect
AR Fun
Creative effects
Face detection
Face in
Flash/Photo light
Front-facing camera (2.2 MP
720p)
Geotagging
HDR for pictures
Image stabiliser
Live on You Tube
Multi camera
Movie creator
Object tracking
Portrait Retouch
Quick Launch
Red-eye reduction
Scene recognition
Self-timer
Send to web
Smile Shutter™
Sound Photo
Social live*
Sweep Panorama
Timeshift burst
Touch capture
Video recording (HD 1080p)
Video stabiliser
White balance
3D Surround Sound (VPT)
Album art
Bluetooth® stereo (A2DP)
ClearAudio+
Clear Bass™
Clear Phase™
Clear stereo
Dynamic normaliser
Manual equaliser
SensMe™
TrackID™ music recognition*
Walkman® application
xLoud™ Experience
Bookmarks
Google Chrome™*
Google Play™
Google™ search*
Google Voice™ Search*
Google Maps™ for Mobile with
Street view*
Info-eye™*
Web browser (WebKit™)*
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Communication
Messaging
Design
Answering machine*
Call list
Conference calls
Facebook™ application*
Google+*
Hangouts™*
HD voice support
Loud Speaker
Noise suppression
Speakerphone
Voice enhancement
Xperia™ Socialife*
Conversations
Email
Google mail™*
Handwriting recognition
Instant messaging
Multimedia messaging (MMS)
Predictive text input
Text messaging (SMS)
Auto rotation
Battery STAMINA mode
Gesture input
Illumination effect
On-screen 12-key keyboard
On-screen QWERTY keyboard
Picture wallpaper
Screen capturing
Simple UI
Throw
Touch screen
Ultra STAMINA mode
Voice input
Wallpaper animation
* This service is not available in all markets.
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Entertainment
Organiser
Connectivity
Media browser
Motion gaming
PlayMemories*
PlayStation® Certified
Radio (FM radio with RDS)
SensMe™ slideshow
Sony Entertainment Network**
Video streaming
YouTube™*
Airplane mode
Alarm clock
Calculator
Calendar
Contacts
Setup guide
Sketch
Stopwatch
Timer
3.5 mm audio jack (CTIA)
aGPS*
Bluetooth® 4.1 wireless
technology
Cast screen
DLNA Certified®
GLONASS
Media Go™*
Media Transfer Protocol support
Micro USB support
Native USB tethering
Media Go™*
NFC (Only available for E2003)
PC Companion
Screen mirroring
Smart Connect
Synchronisation via Facebook™
Synchronisation via Google™
Synchronisation via Microsoft®
Exchange ActiveSync®
Synchronisation via SyncML™
USB charging
USB High speed 2.0 support
USB mass storage
Xperia Link™
Wi-Fi®
Wi-Fi® Hotspot functionality
* This service is not available in all markets.
** Sony Entertainment Network with Music Unlimited is not available in every market. Separate
subscription required. Additional terms and conditions apply.
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Technologies in detail
The information presented in this section is a general overview of the technology incorporated into the
product. However, hardware and software levels of compliance to standards and specifications vary
between products and markets. For more information, contact Sony Mobile Developer World or the
relevant Sony representative.
Device-to-device communications (local)
Bluetooth® wireless technology
Bluetooth® profiles supported
Advanced Audio Distribution Profile v1.2
Audio /Video Remote Control Profile v1.5
Hands Free Profile v1.6
Human Interface Device Profile
Headset Profile v1.2
Message Access Profile v1.0
Object Push Profile v1.1
Personal Area Networking Profile
Phone Book Access Profile v1.1
SIM Access Profile v1.1
Core version and supported
core features
Version 4.1
Connectable devices
Products that support at least one of the profiles listed
above.
Bluetooth 4.1 accessories generally require installation of
a supporting application.
More information:
www.sonymobile.com/developer
www.bluetooth.com
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Wi-Fi®
Supported standards
IEEE 802.11 a/b/g/n and Wi-Fi®
Wi-Fi Direct®, Wi-Fi Protected Setup
Connectable devices
Wi-Fi® access points
Wi-Fi Direct® compatible devices
Frequency band
2.4 GHz and 5 GHz
Data transfer rate
Up to 150 Mbit/s
Security
Open Authentication
Shared Authentication
EAP-SIM
EAP-AKA
EAP-TLS
EAP-TTLS/MSCHAPv2
PEAPv0/EAP-MSCHAPv2
PEAPv1/EAP-GTC
WPA Personal and WPA2 Personal
WPA Enterprise and WPA2 Enterprise
Encryption
WEP 64 bit, WEP 128 bit, TKIP and CCMP (AES)
Power save
WMM-UAPSD
QoS
WMM
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DLNA Certified® (Digital Living Network Alliance)
Supported Device Classes
M-DMS – Mobile Digital Media Server
Media Types: image, video and music
Summary: The digital media server exposes the media
files in your device to a Wi-Fi® network. The files can
then be accessed from other DLNA Certified® clients.
M-DMP – Mobile Digital Media Player
Media Types: image, video and music
Summary: Play content stored on another device, for
example, a server or a PC, directly on your device.
M-DMC – Mobile Digital Media Controller
Media Types: image, video and music
Summary: Digital Media Controllers find content offered
by a DMS or M-DMS and match it to the rendering capabilities of a DMR — setting up the connections between
the DMS and DMR.
+PU+
Media Types: image, video and music
Summary: Play media in your device on another device,
such as a TV or a PC using 2 box push technology. +PU+
is integrated in the Album, Movies and Walkman® applications.
+DN+
Media Types: image, video and music
Summary: Download content stored on another device,
for example, a server or a PC, and play the downloaded
content directly on your device.
+UDO+
Media Types: image, video and music
Summary: The digital media server also has the capability
to get uploaded files from other DLNA Certified® clients.
Supported Bearers
Wi-Fi®
Wi-Fi Direct™
DRM Support
The DLNA Certified® implementation does not support
DRM-protected content.
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Messaging
MMS (Multimedia Messaging Service)
According to OMA Multimedia Messaging Service v1.0 + SMIL
Email
Bearer type (IP)
GPRS, EGPRS, UMTS, Wi-Fi®, LTE
Character sets
BIG5 Traditional Chinese
GB2312 Simplified Chinese
GB18030
ISO-2022-JP Japanese
ISO-8859-1
ISO-8859-2 Eastern Europe
ISO-8859-5 Cyrillic
ISO-8859-7 Greek
ISO-8859-9 Turkish
ISO 8859-11
KOI8-R Cyrillic
Shift_JIS Japanese
USASCII
UTF-16
UTF-8
Windows® 874
Windows® 1251 Cyrillic
Windows® 1252
Windows® 1254 Turkish
Windows® 1258 Vietnamese
Protocols
POP3 and IMAP4
Push email
Microsoft® Exchange ActiveSync® (EAS)
Secure email
SSL/TLS, both port methods (POPS/IMAPS) and STARTTLS
HTML mail
Yes (read only)
More information:
www.sonymobile.com/developer
www.openmobilealliance.org
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Positioning – location based services
Supported standards:
• OMA Secure User Plane Location (SUPL) v1.0
• 3GPP™ Control Plane location (including Emergency location), only supports E911
Provisioning (OMA CP)
OMA CP version 1.1
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Multimedia (audio, image and video)
Audio Playback
Audio Recording
Image Playback
Image Capture
Video Playback
Decoder format
Supported in file format
Audio decoding MPEG-1/2/2.5,
audio layer 3
MP3 (.mp3), 3GPP (.3gp),
MP4 (.mp4, .m4a)
AAC, AAC+, eAAC+
3GPP (.3gp), MP4 (.mp4)
AMR-NB, AMR-WB
3GPP (.3gp), MP4 (.mp4)
General MIDI (GM)
SMF (.mid)
Linear PCM 16 bit
WAV (.wav)
OTA
OTA (.ota)
Ogg vorbis
Ogg vorbis (.ogg)
WMA
ASF (.wma)
Encoder format
Supported in file format
AMR-NB, AMR-WB
3GPP (.3gp), MP4 (.mp4),
AMR (.amr)
AMR-NB, AMR-WB, AAC-LC stereo
Sample rate: 49 kHz
Bit rate: up to 128 kbps
3GPP (.3gp), MP4 (.mp4)
Decoder format
Supported in file format
1, 4, 8, 16, 24 and 32 bpp and RLE
encoded formats
BMP (.bmp)
Single and multi-frame, bitmap
mask support (GIF87a format and
GIF89a format)
GIF (.gif)
Joint Photographic Experts Group
JPEG (.jpg)
Portable Network Graphics Bitmap
mask support
PNG (.png)
Webp
Webp (.webp)
Encoder format
Supported in file format
Joint Photographic Experts Group
JPEG (.jpg)
Decoder format
Supported in file format
MPEG-4 Visual Simple Profile
3GPP (.3gp), MP4 (.mp4)
H.264
3GPP (.3gp), MP4 (.mp4)
H.263 Profile 0
3GPP (.3gp)
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Video Recording
Audio/Video Streaming
Encoder format
Supported in file format
- Video H.263 Profile 0, H.264 High
Profile
- Audio: AAC-LC stereo
Bit rate: 10 Mbps
AMR-NB
3GPP (.3gp), MP4 (.mp4)
Streaming transport
RTSP according to 3GPP™
HTTP streaming
Synchronisation (OMA DS, EAS, Google Sync™)
OMA Data Synchronisation protocol versions 1.1.2 and 1.2
OMA Data Formats: vCard 2.1, vCalendar 1.0
Microsoft® Exchange ActiveSync® protocol version 2.5
Microsoft® Exchange ActiveSync® protocol version 12.0
Microsoft® Exchange ActiveSync® protocol version 14.0
Microsoft® Exchange ActiveSync® protocol version 14.1
Google Sync™
Related information:
www.sonymobile.com/developer
Web browser
Google Chrome™ for Android™ is pre-installed in markets/regions where no restrictions apply.
Related information:
https://play.google.com/store/apps/details?id=com.android.chrome
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Memory in Android™ devices
To use Android devices efficiently, users should be aware of the different types of device memory. This
knowledge is important in order to understand, for example, where data such as music, photos and
videos is saved; how many apps can be downloaded from Google Play™; and how photos can be copied
to a PC.
Information regarding memory presented in this section may be useful to developers when optimising
applications for mobile devices.
Generally, all Android devices share the same basic memory setup. What differs is how much memory is
available to you via the different types of memory, and whether your device uses an external SD card or an
internal memory chip. Any information specific to the particular device model described in this White
Paper is noted as such.
Types of memory
The types of memory described and numbered below are consistent with the terminology used in Sony
mobile device menus and in other content relating to 2015 Xperia™ devices:
1. Dynamic Memory (also known as RAM) is used by applications that run when the device is turned on.
The amount of Dynamic Memory influences how many applications and operating system services can
run at the same time. The Android operating system automatically closes applications and services
that are not being used.
However, such automatic functionality has limits. For example, if a lower amount of free RAM is
available to applications after a new release of the operating system (due to increased capabilities in
the system), device speed will eventually be impacted. This is the main reason that a device cannot be
indefinitely upgraded to newer releases of Android™.
If you experience problems with RAM, for example, if the device runs slower than usual or if the Home
application restarts frequently when you leave an application, you should minimise the use of apps that
run all the time. Social networking apps that connect and update their data online and animated
backgrounds are examples of apps that are always running and affect RAM performance. To minimise
RAM issues, you could also consider using a static wallpaper instead of a live wallpaper.
To see which apps and services are currently active, go to Settings > Apps > Running. You should
have at least 100 MB, and ideally 200 MB or more, of free RAM to avoid slowdowns and application
restarts.
You should also be aware that if you update the device to a later Android release, the load on the builtin Dynamic Memory will increase due to the addition of more features. As a result, the device may run
slower after an update.
The Xperia™ E4g has 758 MB of RAM available to the Android OS and any installed applications. 350
MB of the total RAM is in use during normal operation when the user starts using the device out of the
box.
2. System Memory (also known as “System partition” or “/system”) is used for the Android OS and for
most applications that are pre-loaded from the factory. This type of memory is normally locked, and
can only be changed through a firmware upgrade. There is usually some free space available in this
section of memory. However, since it is locked, you cannot save apps, photos or any other content to
this memory. System Memory is reserved for future firmware upgrades, which almost always need
more memory than the original firmware. You cannot see or influence the use of this memory.
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3. Internal Storage is referred to as "working" memory. It can be compared to the C: drive on a PC or to
the startup disk on a Mac.
This type of memory is used to store all application downloaded from the Google Play™ Store (and
other sources) as well as their settings and data (such as emails, messages and calendar events, for
example). All applications have an allocated area for application data. Memory dedicated to an
application is inaccessible to other applications.
Some game applications also store content such as game music and game level information outside
their own designated area. In most cases, an application can choose to save its data in a location of its
own choosing (outside the protected application settings area). Generally, such content is not deleted
when an application is uninstalled; it must be removed manually by connecting the device to a
computer with a USB cable, or by using a file manager application.
Internal storage is also used for all added user content. For example, photos taken using the device's
camera, media files downloaded from the Internet and file transfers are stored in this area. Typical user
content includes:
• photos
• movies
• music
• Email attachments
Internal Storage will tend to fill up as a result of normal usage. Devices with a large initial Internal
Storage can handle more applications and store more user content.
If the Internal Storage starts to get full, the device slows down, and in some cases it might no longer be
possible to install more apps. You should always ensure that you have at least 100 MB of free Internal
Storage. If not, you should consider removing some apps that you seldom use, or move content that
you do not frequently access to external storage.
You can see approximately how much Internal Storage is free in Settings > Storage > DEVICE
MEMORY. You can also view more details about how much memory is used by applications under
Settings > Apps. In the Xperia™ E4g, about 4.8 GB of Internal Storage is available out of the box.
Please note that in Sony Mobile 2015 products, “Internal Storage” is now the combination of what was
previously known as “Device Memory” or “Phone Memory” (for applications and their data – also
previously known as “/data”) and “Internal Storage” (for user’s content – also previously known as “/
sdcard”). The changes in Internal Storage were made so that memory usage could be more flexible
and to allow encryption of user content.
Memory card slot
Some products include both a large internal memory and a built-in memory card reader. Android manages
devices with a built-in memory card reader and internal memory differently from a device that includes
only a built-in memory card reader.
Since most applications expect only a single location for storage, such applications will not generally
allow you to SAVE anything to the memory card (i.e., they do not offer the option to choose a storage
location). However, some applications (for instance, the Sony Mobile “Camera” application) may actually
allow you to do so. Other applications, for example, backup applications such as the Sony Mobile
“Memory” application, will by definition be configured to copy content from the Internal Storage to the
external SD card.
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On the other hand, when it comes to reading from an external SD Card, you will be able to access content
(for example, videos, photos and music) on a memory card inserted in this slot without any special
consideration since the Android system searches all available memory for content. Therefore, such
products may be regarded as supporting a fourth type of memory, called “External Card” or “SD Card”.
4. SD Card (known as “/ext_card” from a programmer’s point of view, or by other names in other Android
products) is the name for the removable SD memory card in all 2015 Sony Mobile products. As
described in the previous section, this External Card memory is generally more limited in that any
application can read from it, but many applications cannot save to this card. Only a few applications,
including backup applications and file manger applications, have the capability to save to this card.
Backing up data to different memory types
Generally, you should not save photos, videos and other personal content solely on the internal memory
of a device. If something should happen with the hardware, or if the device is lost or stolen, the data
stored on the device’s internal memory is gone forever.
In a device where an SD card reader is the main memory, it is relatively easy to take the card out and copy
all content to a PC or Mac, or to an entertainment device with a memory card slot. In a product featuring
Internal Storage as the main memory, it is not possible to physically remove the memory. Instead, any
critical or high-value content must either be copied to an external SD card by a special backup
application, transferred to remote storage over a network (mobile or Wi-Fi), or to a computer via a USB
cable.
To facilitate the transfer of data via a cable, the Xperia™ E4g supports Media Transfer Protocol (MTP),
which makes it possible to easily transfer content back and forth between your device and a Windows®
PC. For Apple™ Mac® computers, a special application called Sony™ Bridge for Mac is available with
built-in support for MTP. This application can be downloaded from the Xperia™ E4g support page.
Note that you do not need to back up or make a copy of applications that you have downloaded from the
Google Play™ Store. They can normally be downloaded again after you have set up your Google account
to work in a new device (or in a device where the memory has been completely erased).
Note 1:
Some Android devices, including Sony Mobile devices from 2012 and Sony Ericsson devices from 2011
and earlier, do not use a single “Internal Storage” for both applications (and their data) and user content.
Instead, these devices use either an external SD card for user content, or a corresponding area of internal
memory to reproduce the functionality of an SD card. In such devices, there is a fixed limit between the
application area (“/data”) and the user content area (“/sdcard”), with the result that user content can build
up and reach this limit. When the user content reaches this limit, no additional data can be added using
any application. For example, the camera application would no longer be able to capture additional
photos even if a considerable amount of free space was available in the application area. This limit also
applies to the application area. Downloading and installing new applications would not be possible even if
there was enough free memory in the user content area.
Note 2:
Some devices with integrated storage have abandoned the distinction between the application area and
the content area when it comes to a Factory Data Reset. As a result, there is no option in such devices to
perform a Factory Data Reset and preserve content. In such devices, all content is completely deleted
from the device when a reset is performed.
In contrast, Sony Mobile’s memory integration solution makes it possible to preserve user content in this
situation. Therefore, when performing a Factory Data Reset, the default action will still be to only remove
applications and their data, and an option box must be checked if all content is to be removed as well (as
might be desirable when selling the device second-hand).
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Note 3:
For a developer, it is important to note that from a programming point of view the location names used to
refer to the different memory areas described in Note 1 are still valid, i.e., the area used for applications (“/
data”) is still present, as is the area used for content (“/sdcard”).
In reality, “sdcard” is a “symbolic link” to “/data/media”. However, from inside an Android application, “/
sdcard” can still be used. For example, you can use “sdcard/DCIM/100Android” to find all camera
images. The continued use of “/sdcard” to access the content area ensures compatibility across different
products and Android releases in this regard.
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Trademarks and acknowledgements
All product and company names mentioned herein are the trademarks or registered trademarks of their
respective owners. Any rights not expressly granted herein are reserved. All other trademarks are property
of their respective owners.
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February 2015
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