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Phone Samsung SGH-X640 Motorola V878 Samsung Messager R450
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? ? 2.1" diag.
4 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
176 x 220 pixels
(~134 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ?
Battery 800 mAh ? 960 mAh
Processor ? ? ?
RAM ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware
Main Camera Yes Yes 1 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - ? -
Front Camera - - -
Weight 3 oz
(85g)
2.82 oz
(80g)
4.58 oz
(130g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.23" x 1.65" x 0.85"
(82 x 42 x 21.6 mm)
4.4" x 2" x 0.7"
(112 x 51 x 17.8 mm)
Form Factor Clamshell Clamshell Slab
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

GSM: 900, 1800, 1900

CDMA: 850, 1700, 1900

Data Technology GPRS GPRS 1xRTT
Features 
GPS / Location - - Yes
Accessibility
Hearing Aid Compatible - - Yes
M3 (mostly compatible)
Multiple Languages Yes Yes Yes
TTY/TDD (Digital) - - Yes
Alerts
Extra Display - Yes -
Ringer Profiles - Yes -
Connectivity
Bluetooth - - Yes
USB - Yes Yes
Contacts
Picture ID Yes Yes Yes
Ringer ID Yes Yes Yes
Voice Dialing - Yes Yes
Customization
Custom Graphics Yes Yes Yes
Custom Ringtones Yes Yes Yes
Data & Network
Data Tethering - Yes -
WAP / Web Browser Yes Yes Yes
Input
Predictive Text Entry Yes Yes Yes
Side Keys Yes Yes Yes
Text Keyboard, Hardware - - Yes
Memory
Memory Card Slot - - Yes
Messaging
EMS / Picture Messaging Yes Yes -
MMS Yes Yes Yes
Text Messaging Templates Yes - Yes
Music
Music Player - - Yes
Productivity
Alarm Yes Yes Yes
Calculator Yes Yes Yes
Calendar Yes Yes Yes
To-Do List Yes - -
Voice Memo Yes Yes Yes
Software
BREW - - Yes
Games Yes Yes Yes
Java (J2ME) Yes Yes -
Voice
Headset Jack (2.5 mm) Yes - -
Speaker Phone Yes - Yes
  Samsung SGH-X640 Motorola V878 Samsung Messager R450
  X > < X > < X

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Phone Samsung SGH-X640 Motorola V878 Samsung Messager R450

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