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Phone LG AX-490 Samsung SGH-X640 Samsung Impression SGH-A877
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? ? 3.2" diag.
5 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
240 x 400 pixels
(~146 ppi)
AMOLED
Display Refresh ? ? ?
Battery 1,100 mAh 800 mAh 1,000 mAh
Processor ? ? ?
RAM ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware
Main Camera Yes Yes 3 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - - QVGA (320 x 240)
Front Camera - - -
Weight 3.79 oz
(107g)
3 oz
(85g)
5.2 oz
(147g)
Dimensions 3.74" x 1.92" x 1"
(95 x 49 x 25.4 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.48" x 2.28" x 0.64"
(114 x 58 x 16.3 mm)
Form Factor Clamshell Clamshell Slab
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

AMPS: 850

GSM: 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

Data Technology 1xRTT GPRS HSDPA 3.6
Features 
GPS / Location Yes - Yes
Accessibility
Hearing Aid Compatible Yes
M3 (mostly compatible)
- Yes
M3 (mostly compatible)
Multiple Languages Yes Yes Yes
TTY/TDD (Digital) Yes - -
Alerts
Extra Display Yes - -
Ringer Profiles - - Yes
Connectivity
Bluetooth Yes - Yes
USB Yes - Yes
Contacts
Picture ID Yes Yes Yes
Ringer ID Yes Yes Yes
Voice Dialing Yes - -
Customization
Custom Graphics Yes Yes Yes
Custom Ringtones Yes Yes Yes
Real-Music Ringers Yes - Yes
Data & Network
Data Tethering Yes - Yes
WAP / Web Browser Yes Yes Yes
Input
Predictive Text Entry - Yes Yes
Side Keys Yes Yes Yes
Text Keyboard, Hardware Yes - Yes
Touch Screen - - Yes
Resistive
Memory
Memory Card Slot - - Yes
Messaging
Email Client - - Yes
EMS / Picture Messaging - Yes -
Instant Messaging - - Yes
MMS Yes Yes Yes
Text Messaging Templates Yes Yes Yes
Music
Music Player - - Yes
Stereo Speakers Yes - -
Productivity
Alarm Yes Yes Yes
Calculator Yes Yes Yes
Calendar Yes Yes Yes
To-Do List - Yes Yes
Voice Memo Yes Yes Yes
Software
BREW Yes - -
Games Yes Yes Yes
Java (J2ME) - Yes Yes
Voice
Headset Jack (2.5 mm) Yes Yes -
Speaker Phone Yes Yes Yes
  LG AX-490 Samsung SGH-X640 Samsung Impression SGH-A877
  X > < X > < X

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Phone LG AX-490 Samsung SGH-X640 Samsung Impression SGH-A877

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