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Phone Ericsson R520 Casio G'zOne Boulder Samsung M400
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 2" diag.
4 : 3
2.4" diag.
4 : 3
Display Resolution & Type ? 240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ?
Battery ? 810 mAh 1,000 mAh
Processor ? ? 400 MHz Qualcomm QSC6155
RAM ? ? 128 MB
Storage ? raw hardware ? raw hardware 256 MB
Main Camera - 1 megapixel 1 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - ? -
Front Camera - - -
Weight 4.23 oz
(120g)
4.9 oz
(139g)
3.7 oz
(105g)
Dimensions 5.12" x 1.97" x 0.63"
(130 x 50 x 16 mm)
3.9" x 2" x 0.9"
(99 x 51 x 22.9 mm)
3.8" x 1.9" x 0.7"
(97 x 48 x 17.8 mm)
Form Factor Slab Clamshell Clamshell
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

CDMA: 800, 850, 1900

Data Technology GPRS EVDO rA 1xRTT
Features 
Flashlight - Yes -
GPS / Location - Yes Yes
Ruggedized - Yes -
Water-Resistant - Yes -
Accessibility
Adjustable Text Size - - Yes
Hearing Aid Compatible - Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Multiple Languages Yes Yes Yes
TTY/TDD (Digital) - Yes Yes
Alerts
Extra Display - Yes Yes
Ringer Profiles Yes - -
Connectivity
Bluetooth Yes Yes Yes
Infrared (IR) Yes - -
USB - Yes Yes
Micro-USB
Contacts
Picture ID - Yes Yes
Ringer ID - Yes Yes
Voice Dialing Yes Yes Yes
Customization
Changeable Body Plates - Yes -
Custom Graphics - Yes Yes
Custom Ringtones Yes Yes Yes
Real-Music Ringers - - Yes
Data & Network
Data Tethering Yes Yes -
WAP / Web Browser Yes Yes Yes
Input
Predictive Text Entry Yes Yes Yes
Side Keys Yes Yes Yes
Memory
Memory Card Slot - Yes -
Messaging
EMS / Picture Messaging - Yes -
MMS - Yes Yes
Text Messaging Templates Yes Yes Yes
Music
Headphone Jack (3.5mm) - - Yes
Music Player - Yes -
Productivity
Alarm Yes Yes Yes
Calculator Yes Yes Yes
Calendar Yes Yes Yes
Voice Memo Yes Yes Yes
Software
BREW - Yes -
Games Yes Yes Yes
Voice
Push-To-Talk - Yes -
Speaker Phone Yes Yes Yes
  Ericsson R520 Casio G'zOne Boulder Samsung M400
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Phone Ericsson R520 Casio G'zOne Boulder Samsung M400

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