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Phone Samsung SGH-X640 Samsung SCH-A610 Sanyo SCP-3810 / Mirro Motorola Rival A455
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? ? 2.4" diag.
4 : 3
2.2" diag.
4 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~131 ppi)
LCD (TFT/TFD)
Display Refresh ? ? ? ?
Battery 800 mAh 1,300 mAh 1,000 mAh 940 mAh
Processor ? ? ? ?
RAM ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera Yes Yes 1 megapixel 2 megapixel
Wide Camera - - - -
Tele Camera - - - -
Video Capture - - - QVGA (320 x 240)
Front Camera - - - -
Weight 3 oz
(85g)
4.23 oz
(120g)
3.97 oz
(112g)
4.48 oz
(127g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.5" x 1.9" x 0.9"
(89 x 48 x 22.9 mm)
3.82" x 2.01" x 0.71"
(97 x 51 x 18.1 mm)
3.82" x 1.96" x 0.73"
(97 x 50 x 18.5 mm)
Form Factor Clamshell Clamshell Clamshell Slide
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

CDMA: 850, 1900

CDMA: 850, 1900

Data Technology GPRS 1xRTT 1xRTT EVDO r0
Features 
GPS / Location - Yes Yes Yes
Accessibility
Adjustable Text Size - - Yes -
Hearing Aid Compatible - - Yes
M4, T4 (very tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes Yes Yes Yes
TTY/TDD (Digital) - - Yes Yes
Alerts
Extra Display - - Yes -
Connectivity
Bluetooth - - Yes Yes
USB - - Yes
Micro-USB
Yes
Micro-USB
Contacts
Picture ID Yes Yes Yes Yes
Ringer ID Yes Yes Yes Yes
Voice Dialing - Yes Yes Yes
Customization
Custom Graphics Yes Yes Yes Yes
Custom Ringtones Yes Yes Yes Yes
Real-Music Ringers - - Yes Yes
Data & Network
Data Tethering - Yes Yes Yes
WAP / Web Browser Yes Yes Yes Yes
Input
Predictive Text Entry Yes Yes Yes -
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes
Touch Screen - - - Yes
Memory
Memory Card Slot - - - Yes
Messaging
Email Client - - Yes Yes
EMS / Picture Messaging Yes Yes - Yes
Instant Messaging - - Yes Yes
MMS Yes Yes - Yes
Text Messaging Templates Yes Yes Yes Yes
Music
Headphone Jack (3.5mm) - - - Yes
Music Player - - - Yes
Productivity
Alarm Yes Yes Yes Yes
Calculator Yes Yes Yes Yes
Calendar Yes Yes Yes Yes
To-Do List Yes Yes Yes -
Voice Memo Yes Yes Yes Yes
Software
BREW - Yes - Yes
Games Yes Yes Yes Yes
Java (J2ME) Yes - Yes -
Voice
Headset Jack (2.5 mm) Yes Yes Yes -
Speaker Phone Yes - Yes Yes
  Samsung SGH-X640 Samsung SCH-A610 Sanyo SCP-3810 / Mirro Motorola Rival A455
  X > < X > < X > < X

NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SGH-X640 Samsung SCH-A610 Sanyo SCP-3810 / Mirro Motorola Rival A455

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