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Phone Samsung SGH-X640 Samsung SGH-D307 Samsung SGH-R225 / SGH-R225M Sony Ericsson W810 BlackBerry 7750
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? ? ? ? ?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
128 x 64 pixels 176 x 220 pixels
LCD (TFT/TFD)
240 x 240 pixels
LCD (Color)
Display Refresh ? ? ? ? ?
Battery 800 mAh ? ? ? ?
Processor ? ? ? ? ?
RAM ? ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera Yes - - 2 megapixel -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - - - ? -
Front Camera - - - - -
Weight 3 oz
(85g)
4.3 oz
(122g)
3.35 oz
(95g)
3.49 oz
(99g)
5.01 oz
(142g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.7" x 1.9" x 0.85"
(94 x 48 x 21.6 mm)
4.33" x 1.81" x 0.93"
(110 x 46 x 23.6 mm)
3.94" x 1.81" x 0.77"
(100 x 46 x 19.6 mm)
4.76" x 3.03" x 0.71"
(121 x 77 x 18 mm)
Form Factor Clamshell Clamshell Slab Slab Slab
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary) BlackBerry OS
Network Bands

GSM: 900, 1800, 1900

GSM: 850, 1800, 1900

GSM: 900, 1900

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

Data Technology GPRS EDGE - EDGE 1xRTT
Features 
Flashlight - - - Yes -
GPS / Location - - - - n/a
Accessibility
Hearing Aid Compatible - Yes
M4 (very compatible)
- - -
Multiple Languages Yes Yes Yes Yes n/a
TTY/TDD (Digital) - Yes - Yes Yes
Alerts
Extra Display - Yes - - -
Ringer Profiles - - - Yes Yes
Connectivity
Bluetooth - Yes - Yes -
Infrared (IR) - - - Yes -
USB - Yes - Yes Yes
Contacts
Picture ID Yes Yes - Yes n/a
Ringer ID Yes Yes Yes Yes n/a
Voice Dialing - Yes - Yes n/a
Customization
Custom Graphics Yes Yes Yes Yes n/a
Custom Ringtones Yes Yes Yes Yes n/a
Real-Music Ringers - Yes - Yes n/a
Data & Network
Data Tethering - Yes Yes Yes n/a
External Antenna Jack - - - Yes n/a
WAP / Web Browser Yes Yes - Yes n/a
Input
Predictive Text Entry Yes Yes Yes Yes n/a
Side Keys Yes Yes - Yes Yes
Text Keyboard, Hardware - Yes - - Yes
Memory
Memory Card Slot - - - Yes -
Messaging
Email Client - Yes - Yes n/a
EMS / Picture Messaging Yes Yes - Yes n/a
Instant Messaging - - - Yes n/a
MMS Yes Yes Yes Yes n/a
Text Messaging Templates Yes Yes Yes Yes n/a
Music
FM Radio - - - Yes -
Music Player - - - Yes n/a
Productivity
Alarm Yes Yes Yes Yes n/a
Calculator Yes Yes Yes Yes n/a
Calendar Yes Yes Yes Yes n/a
To-Do List Yes Yes - Yes n/a
Voice Memo Yes Yes - Yes n/a
Software
Games Yes Yes Yes Yes n/a
Java (J2ME) Yes Yes - Yes n/a
Voice
Headset Jack (2.5 mm) Yes - Yes - n/a
Speaker Phone Yes Yes - Yes -
  Samsung SGH-X640 Samsung SGH-D307 Samsung SGH-R225 / SGH-R225M Sony Ericsson W810 BlackBerry 7750
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung SGH-D307 Samsung SGH-R225 / SGH-R225M Sony Ericsson W810 BlackBerry 7750

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