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Phone Sony Ericsson J300a Samsung Wafer R510 Samsung Jitterbug J / SPH-A310
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 1.9" diag.
4 : 3
2.1" diag.
4 : 3
Display Resolution & Type 128 x 128 pixels
LCD (STN)
220 x 176 pixels
(~148 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~134 ppi)
LCD (Color)
Display Refresh ? ? ?
Battery ? 800 mAh ?
Processor ? ? ?
RAM ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware
Main Camera - 1 megapixel -
Wide Camera - - -
Tele Camera - - -
Video Capture - ? -
Front Camera - - -
Weight 2.75 oz
(78g)
2.47 oz
(70g)
3.99 oz
(113g)
Dimensions 3.9" x 1.68" x 0.72"
(99 x 43 x 18.3 mm)
4.45" x 1.97" x 0.33"
(113 x 50 x 8.4 mm)
3.87" x 2.16" x 0.97"
(98 x 55 x 24.6 mm)
Form Factor Slab Slab Clamshell
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 850, 1900

CDMA: 850, 1900

CDMA: 850, 1900

Data Technology GPRS EVDO r0 -
Features 
GPS / Location - Yes Yes
Accessibility
Hearing Aid Compatible - Yes Yes
Multiple Languages - Yes -
TTY/TDD (Digital) Yes Yes -
Alerts
Extra Display - - Yes
Ringer Profiles Yes - -
Connectivity
Bluetooth - Yes
Classic Audio
Yes
Classic Audio
USB Yes - -
Contacts
Picture ID Yes Yes -
Voice Dialing Yes Yes Yes
Customization
Changeable Body Plates Yes - -
Custom Graphics Yes Yes -
Custom Ringtones Yes Yes -
Data & Network
Data Tethering Yes - -
WAP / Web Browser Yes Yes -
Input
Predictive Text Entry Yes Yes -
Side Keys - Yes Yes
Memory
Memory Card Slot - Yes -
Messaging
Email Client Yes - -
EMS / Picture Messaging Yes - -
MMS Yes Yes -
Text Messaging Templates - - Yes
Music
Music Player - Yes -
Stereo Speakers - Yes -
Productivity
Alarm Yes Yes -
Calculator Yes Yes -
Calendar Yes Yes -
To-Do List Yes - -
Voice Memo Yes Yes -
Software
BREW - Yes -
Games Yes Yes -
Java (J2ME) Yes - -
Voice
Speaker Phone Yes Yes Yes
  Sony Ericsson J300a Samsung Wafer R510 Samsung Jitterbug J / SPH-A310
  X > < X > < X

NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Sony Ericsson J300a Samsung Wafer R510 Samsung Jitterbug J / SPH-A310

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