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Phone Sony Ericsson Z550a Ericsson T28 World Siemens CX75 Nokia 5165
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Not yet released Released
Specifications 
Display Size 1.9" diag.
4 : 3
? ? ?
Display Resolution & Type 176 x 220 pixels
(~148 ppi)
LCD (TFT/TFD)
? 132 x 176 pixels
LCD (TFT/TFD)
?
Display Refresh ? ? ? ?
Battery ? 500 mAh 750 mAh ?
Processor ? ? ? ?
RAM ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera 1 megapixel - 1 megapixel -
Wide Camera - - - -
Tele Camera - - - -
Video Capture ? - ? -
Front Camera - - - -
Weight 3.26 oz
(92g)
3.14 oz
(89g)
3.46 oz
(98g)
5.9 oz
(167g)
Dimensions 3.43" x 1.77" x 0.79"
(87 x 45 x 20.1 mm)
3.9" x 2" x 0.6"
(99 x 51 x 15.2 mm)
4.33" x 1.88" x 0.74"
(110 x 48 x 18.8 mm)
5.1" x 1.9" x 1"
(130 x 48 x 25.4 mm)
Form Factor Clamshell Flip Slab Slab
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 850, 900, 1800, 1900

*

GSM: 900, 1900

GSM: 900, 1800, 1900

TDMA: 850, 1900

AMPS: 850

Data Technology GPRS - GPRS -
Features 
Accessibility
Multiple Languages Yes - Yes Yes
TTY/TDD (Digital) Yes - - -
Alerts
Extra Display Yes - - -
Ringer Profiles Yes Yes Yes Yes
Connectivity
Bluetooth Yes - Yes
Classic Audio
-
Infrared (IR) - - Yes -
USB Yes - Yes -
Contacts
Picture ID Yes - Yes -
Ringer ID Yes - Yes -
Voice Dialing Yes Yes - -
Customization
Changeable Body Plates - - - Yes
Custom Graphics Yes - Yes -
Custom Ringtones Yes Yes Yes Yes
Real-Music Ringers Yes - - -
Data & Network
Data Tethering Yes Yes Yes -
WAP / Web Browser Yes - Yes -
Input
Predictive Text Entry Yes - Yes Yes
Side Keys Yes Yes Yes -
Memory
Memory Card Slot Yes - Yes -
Messaging
Email Client Yes - Yes -
EMS / Picture Messaging - - Yes -
MMS Yes - Yes -
Text Messaging Templates Yes - - -
Music
FM Radio Yes - - -
Music Player Yes - Yes -
Productivity
Alarm Yes Yes Yes Yes
Calculator Yes Yes Yes -
Calendar Yes - Yes -
To-Do List Yes - Yes -
Voice Memo Yes - Yes -
Software
Games Yes Yes Yes Yes
Java (J2ME) Yes - Yes -
Voice
Push-To-Talk Yes * - Yes -
Speaker Phone Yes - Yes -
  * Some versions only
  Sony Ericsson Z550a Ericsson T28 World Siemens CX75 Nokia 5165
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Sony Ericsson Z550a Ericsson T28 World Siemens CX75 Nokia 5165

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