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Phone Samsung SGH-X640 Samsung Zeal / Alias 2 SCH-U750 Huawei Ascend
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 2.6" diag.
4 : 3
3.5" diag.
5 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
(~154 ppi)
LCD (TFT/TFD)
320 x 480 pixels
(~165 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz
Battery 800 mAh 880 mAh 1,500 mAh
Processor ? ? 528 MHz Qualcomm S1 MSM7625
RAM ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware
Main Camera Yes 2 megapixel 3 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - QCIF (176 x 144) CIF (352 x 288)
Front Camera - - -
Weight 3 oz
(85g)
4.34 oz
(123g)
4.76 oz
(135g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.01" x 2.04" x 0.67"
(102 x 52 x 17 mm)
4.57" x 2.44" x 0.55"
(116 x 62 x 14 mm)
Form Factor Clamshell Clamshell Slab
Platform / OS (proprietary) (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

CDMA: 850, 1700, 1900

Data Technology GPRS EVDO r0 EVDO rA
Features 
GPS / Location - Yes n/a
Accessibility
Adjustable Text Size - Yes n/a
Hearing Aid Compatible - Yes
M4 (very compatible)
Yes
M4 (very compatible)
Multiple Languages Yes Yes n/a
TTY/TDD (Digital) - Yes Yes
Alerts
Extra Display - Yes -
Connectivity
Bluetooth - Yes Yes
USB - Yes Yes
Wi-Fi - - Yes
802.11 b,g
Contacts
Picture ID Yes Yes n/a
Ringer ID Yes Yes n/a
Voice Dialing - Yes n/a
Customization
Custom Graphics Yes Yes n/a
Custom Ringtones Yes Yes n/a
Real-Music Ringers - Yes n/a
Data & Network
Data Tethering - Yes n/a
WAP / Web Browser Yes Yes n/a
Input
Predictive Text Entry Yes Yes n/a
Side Keys Yes Yes Yes
Text Keyboard, Hardware - Yes -
Touch Screen - - Yes
Capacitive
Memory
Memory Card Slot - Yes Yes
Messaging
Email Client - Yes n/a
EMS / Picture Messaging Yes - n/a
Instant Messaging - Yes n/a
MMS Yes Yes n/a
Text Messaging Templates Yes Yes n/a
Music
Music Player - Yes n/a
Productivity
Alarm Yes Yes n/a
Calculator Yes Yes n/a
Calendar Yes Yes n/a
To-Do List Yes - n/a
Voice Memo Yes Yes n/a
Software
BREW - Yes n/a
Games Yes Yes n/a
Java (J2ME) Yes - n/a
Voice
Headset Jack (2.5 mm) Yes Yes n/a
Speaker Phone Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Samsung Zeal / Alias 2 SCH-U750 Huawei Ascend
  X > < X > < X

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Phone Samsung SGH-X640 Samsung Zeal / Alias 2 SCH-U750 Huawei Ascend

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