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Phone Samsung Messager R450 Samsung SCH-A610 HTC G2 Casio Exilim C721 Samsung SGH-X660
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.1" diag.
4 : 3
? 3.7" diag.
5 : 3
2.3" diag.
4 : 3
?
Display Resolution & Type 176 x 220 pixels
(~134 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
480 x 800 pixels
(~252 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~174 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz ? ?
Battery 960 mAh 1,300 mAh 1,300 mAh 920 mAh 800 mAh
Processor ? ? 800 MHz Qualcomm S2 MSM7230 ? ?
RAM ? ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera 1 megapixel Yes 5 megapixel 5 megapixel Yes
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - - 720p HD QVGA (320 x 240) ?
Front Camera - - - - -
Weight 4.58 oz
(130g)
4.23 oz
(120g)
6.5 oz
(184g)
4.48 oz
(127g)
2.75 oz
(78g)
Dimensions 4.4" x 2" x 0.7"
(112 x 51 x 17.8 mm)
3.5" x 1.9" x 0.9"
(89 x 48 x 22.9 mm)
4.68" x 2.37" x 0.55"
(119 x 60 x 14 mm)
4.06" x 1.97" x 0.78"
(103 x 50 x 19.9 mm)
3.52" x 1.77" x 0.85"
(89 x 45 x 21.6 mm)
Form Factor Slab Clamshell Slab Clamshell Clamshell
Platform / OS (proprietary) (proprietary) Android (proprietary) (proprietary)
Network Bands

CDMA: 850, 1700, 1900

CDMA: 850, 1900

WCDMA: 1, 4

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

GSM: 900, 1800, 1900

Data Technology 1xRTT 1xRTT HSPA 14.4 EVDO rA GPRS
Features 
Flashlight - - - Yes -
GPS / Location Yes Yes n/a Yes -
Ruggedized - - - Yes -
Water-Resistant - - - Yes -
Accessibility
Adjustable Text Size - - n/a Yes -
Hearing Aid Compatible Yes
M3 (mostly compatible)
- Yes
M3 (mostly compatible)
Yes
M4, T4 (very tele-coil compatible)
-
Multiple Languages Yes Yes n/a Yes Yes
TTY/TDD (Digital) Yes - - Yes -
Alerts
Extra Display - - - Yes Yes
Connectivity
Bluetooth Yes - Yes Yes -
Infrared (IR) - - - - Yes
Mobile Hotspot - - n/a - -
USB Yes - Yes Yes -
Wi-Fi - - Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID Yes Yes n/a Yes Yes
Ringer ID Yes Yes n/a Yes Yes
Voice Dialing Yes Yes n/a Yes -
Customization
Custom Graphics Yes Yes n/a Yes Yes
Custom Ringtones Yes Yes n/a Yes Yes
Real-Music Ringers - - n/a Yes Yes
Data & Network
Data Tethering - Yes n/a Yes -
WAP / Web Browser Yes Yes n/a Yes Yes
Input
Predictive Text Entry Yes Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - Yes - -
Touch Screen - - Yes
Capacitive
- -
Memory
Memory Card Slot Yes - Yes Yes -
Messaging
Email Client - - n/a - -
EMS / Picture Messaging - Yes n/a Yes Yes
Instant Messaging - - n/a Yes -
MMS Yes Yes n/a Yes Yes
Text Messaging Templates Yes Yes n/a Yes Yes
Music
Headphone Jack (3.5mm) - - Yes - -
Music Player Yes - n/a Yes -
Productivity
Alarm Yes Yes n/a Yes Yes
Calculator Yes Yes n/a Yes Yes
Calendar Yes Yes n/a Yes Yes
To-Do List - Yes n/a Yes Yes
Voice Memo Yes Yes n/a Yes Yes
Software
BREW Yes Yes n/a Yes -
Games Yes Yes n/a Yes Yes
Java (J2ME) - - n/a - Yes
Voice
Headset Jack (2.5 mm) - Yes n/a - -
Speaker Phone Yes - Yes Yes Yes
  Samsung Messager R450 Samsung SCH-A610 HTC G2 Casio Exilim C721 Samsung SGH-X660
  X > < X > < X > < X > < X

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Phone Samsung Messager R450 Samsung SCH-A610 HTC G2 Casio Exilim C721 Samsung SGH-X660

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