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Phone Ericsson T66 Motorola Rival A455 Samsung M520 Ericsson T39
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 2.2" diag.
4 : 3
2.1" diag.
4 : 3
?
Display Resolution & Type ? 176 x 220 pixels
(~131 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~134 ppi)
LCD (TFT/TFD)
?
LCD (Grayscale)
Display Refresh ? ? ? ?
Battery ? 940 mAh ? ?
Processor ? ? ? ?
RAM ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera - 2 megapixel 1 megapixel -
Wide Camera - - - -
Tele Camera - - - -
Video Capture - QVGA (320 x 240) ? -
Front Camera - - - -
Weight 2.08 oz
(59g)
4.48 oz
(127g)
2.75 oz
(78g)
3.03 oz
(86g)
Dimensions 3.62" x 1.61" x 0.69"
(92 x 41 x 17.5 mm)
3.82" x 1.96" x 0.73"
(97 x 50 x 18.5 mm)
4.01" x 2.04" x 0.5"
(102 x 52 x 12.7 mm)
3.78" x 1.97" x 0.71"
(96 x 50 x 18 mm)
Form Factor Slab Slide Slide Flip
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

CDMA: 850, 1900

GSM: 900, 1800, 1900

Data Technology - EVDO r0 EVDO r0 GPRS
Features 
GPS / Location - Yes Yes -
Accessibility
Hearing Aid Compatible - Yes Yes -
Multiple Languages Yes Yes Yes Yes
TTY/TDD (Digital) - Yes Yes -
Alerts
Ringer Profiles Yes - - Yes
Connectivity
Bluetooth - Yes Yes Yes
Infrared (IR) - - - Yes
USB - Yes
Micro-USB
Yes -
Contacts
Picture ID - Yes Yes -
Ringer ID - Yes Yes -
Voice Dialing - Yes Yes Yes
Customization
Custom Graphics Yes Yes Yes Yes
Custom Ringtones Yes Yes Yes Yes
Real-Music Ringers - 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 Yes -
Messaging
Email Client - Yes - -
EMS / Picture Messaging Yes Yes - -
Instant Messaging - Yes - -
MMS - Yes - -
Text Messaging Templates Yes Yes Yes Yes
Music
Headphone Jack (3.5mm) - Yes - -
Music Player - Yes Yes -
Productivity
Alarm Yes Yes Yes Yes
Calculator Yes Yes Yes Yes
Calendar Yes Yes Yes Yes
To-Do List Yes - Yes -
Voice Memo - Yes Yes Yes
Software
BREW - Yes - -
Games Yes Yes Yes Yes
Java (J2ME) - - Yes -
Voice
Speaker Phone - Yes Yes -
  Ericsson T66 Motorola Rival A455 Samsung M520 Ericsson T39
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Ericsson T66 Motorola Rival A455 Samsung M520 Ericsson T39

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