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Phone Ericsson R278d Sony Ericsson J300a Ericsson R520 Ericsson T28 World Kyocera 2135
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? ? ? ? ?
Display Resolution & Type 101 x 40 pixels 128 x 128 pixels
LCD (STN)
? ? ?
Display Refresh ? ? ? ? ?
Battery ? ? ? 500 mAh 925 mAh
Processor ? ? ? ? ?
RAM ? ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera - - - - -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - - - - -
Front Camera - - - - -
Weight 9.28 oz
(263g)
2.75 oz
(78g)
4.23 oz
(120g)
3.14 oz
(89g)
4.7 oz
(133g)
Dimensions 5.1" x 2" x 1"
(130 x 51 x 25.4 mm)
3.9" x 1.68" x 0.72"
(99 x 43 x 18.3 mm)
5.12" x 1.97" x 0.63"
(130 x 50 x 16 mm)
3.9" x 2" x 0.6"
(99 x 51 x 15.2 mm)
5.07" x 1.89" x 1.02"
(129 x 48 x 25.9 mm)
Form Factor Slab Slab Slab Flip Slab
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary) (proprietary)
Network Bands

TDMA: 850, 1900

AMPS: 850

GSM: 850, 1900

GSM: 900, 1800, 1900

GSM: 900, 1900

CDMA: 850, 1900

AMPS: 850

Data Technology - GPRS GPRS - -
Features 
Accessibility
Multiple Languages Yes - Yes - Yes
TTY/TDD (Digital) - Yes - - -
Alerts
Ringer Profiles Yes Yes Yes Yes -
Connectivity
Bluetooth - - Yes
HSP, Sync, OPP, DUN
- -
Infrared (IR) - - Yes - -
USB - Yes - - -
Contacts
Picture ID - Yes - - -
Voice Dialing - Yes Yes Yes -
Customization
Changeable Body Plates - Yes - - Yes
Custom Graphics - Yes - - -
Custom Ringtones Yes Yes Yes Yes Yes
Data & Network
Data Tethering Yes Yes Yes Yes Yes
WAP / Web Browser Yes Yes Yes - Yes
Input
Predictive Text Entry Yes Yes Yes - Yes
Side Keys Yes - Yes Yes -
Messaging
Email Client - Yes - - -
EMS / Picture Messaging - Yes - - -
MMS - Yes - - -
Text Messaging Templates - - Yes - Yes
Productivity
Alarm Yes Yes Yes Yes Yes
Calculator - Yes Yes Yes Yes
Calendar - Yes Yes - -
To-Do List - Yes - - -
Voice Memo - Yes Yes - -
Software
Games - Yes Yes Yes Yes
Java (J2ME) - Yes - - -
Voice
Headset Jack (2.5 mm) - - - - Yes
Speaker Phone - Yes Yes - -
  Ericsson R278d Sony Ericsson J300a Ericsson R520 Ericsson T28 World Kyocera 2135
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Ericsson R278d Sony Ericsson J300a Ericsson R520 Ericsson T28 World Kyocera 2135

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