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Phone Samsung SGH-X640 Samsung Galaxy Ring / Prevail 2 UTStarcom PPC-6700 / XV-6700 / HTC Apache Motorola T720 / T721 (GSM)
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 4" diag.
5 : 3
? ?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
120 x 160 pixels
LCD (STN)
Display Refresh ? 60 Hz ? ?
Battery 800 mAh 1,750 mAh 1,350 mAh ?
Processor ? 1.4 GHz Qualcomm Snapdragon S2 MSM8655 416 MHz Intel ?
RAM ? 1 GB ? ?
Storage ? raw hardware 4 GB ? raw hardware ? raw hardware
Main Camera Yes 5 megapixel 1 megapixel -
Wide Camera - - - -
Tele Camera - - - -
Video Capture - 720p HD ? -
Front Camera - 1 megapixel - -
Weight 3 oz
(85g)
3.4 oz
(96g)
6.07 oz
(172g)
3.56 oz
(101g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.83" x 2.48" x 0.47"
(123 x 63 x 11.9 mm)
4.25" x 2.32" x 0.93"
(108 x 59 x 23.6 mm)
3.5" x 1.87" x 0.83"
(89 x 47 x 21.1 mm)
Form Factor Clamshell Slab Slide Clamshell
Platform / OS (proprietary) Android Windows Mobile Professional (proprietary)
Network Bands

GSM: 900, 1800, 1900

CDMA: 800, 850, 1900

CDMA: 850, 1900

GSM: 850, 1900

Data Technology GPRS EVDO rA EVDO r0 GPRS
Features 
GPS / Location - n/a n/a -
Accessibility
Adjustable Text Size - n/a n/a -
Hearing Aid Compatible - Yes
M4 (very compatible)
- -
Multiple Languages Yes n/a n/a Yes
TTY/TDD (Digital) - Yes Yes -
Alerts
Extra Display - - - Yes
Connectivity
Bluetooth - Yes Yes -
Infrared (IR) - - Yes -
USB - Yes Yes
Mini-USB
-
Wi-Fi - Yes
4 (802.11 a,b,g,n)
Yes -
Contacts
Picture ID Yes n/a n/a -
Ringer ID Yes n/a n/a Yes
Voice Dialing - n/a n/a Yes
Customization
Changeable Body Plates - - - Yes
Custom Graphics Yes n/a n/a Yes
Custom Ringtones Yes n/a n/a Yes
Real-Music Ringers - n/a n/a -
Data & Network
Data Tethering - n/a n/a Yes
WAP / Web Browser Yes n/a n/a Yes
Input
Predictive Text Entry Yes n/a n/a Yes
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - Yes -
Touch Screen - Yes
Capacitive
Yes -
Memory
Memory Card Slot - Yes Yes -
Messaging
Email Client - n/a n/a Yes
EMS / Picture Messaging Yes n/a n/a Yes
Instant Messaging - n/a n/a -
MMS Yes n/a n/a -
Text Messaging Templates Yes n/a n/a Yes
Music
Headphone Jack (3.5mm) - Yes - -
Music Player - n/a n/a -
Photo & Video
DLNA - Yes - -
Productivity
Alarm Yes n/a n/a Yes
Calculator Yes n/a n/a Yes
Calendar Yes n/a n/a Yes
To-Do List Yes n/a n/a -
Voice Memo Yes n/a n/a Yes
Software
Games Yes n/a n/a Yes
Java (J2ME) Yes n/a n/a Yes
Voice
Headset Jack (2.5 mm) Yes n/a n/a Yes
Speaker Phone Yes Yes Yes -
  * Some versions only
  Samsung SGH-X640 Samsung Galaxy Ring / Prevail 2 UTStarcom PPC-6700 / XV-6700 / HTC Apache Motorola T720 / T721 (GSM)
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SGH-X640 Samsung Galaxy Ring / Prevail 2 UTStarcom PPC-6700 / XV-6700 / HTC Apache Motorola T720 / T721 (GSM)

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