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Phone Casio G'zOne Rock Sony Ericsson Z550a
Current U.S. Carriers (none) (none)
Global Availability Released Released
Specifications 
Display Size 2.1" diag.
4 : 3
1.9" diag.
4 : 3
Display Resolution & Type 240 x 320 pixels
(~190 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~148 ppi)
LCD (TFT/TFD)
Display Refresh ? ?
Battery 1,150 mAh ?
Processor ? ?
RAM ? ?
Storage ? raw hardware ? raw hardware
Main Camera 2 megapixel 1 megapixel
Wide Camera - -
Tele Camera - -
Video Capture ? ?
Front Camera - -
Weight 4.4 oz
(125g)
3.26 oz
(92g)
Dimensions 4.1" x 2" x 0.9"
(104 x 51 x 22.9 mm)
3.43" x 1.77" x 0.79"
(87 x 45 x 20.1 mm)
Form Factor Clamshell Clamshell
Platform / OS (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

*

Data Technology EVDO rA GPRS
Features 
Flashlight Yes -
GPS / Location Yes -
Ruggedized Yes -
Water-Resistant Yes -
Accessibility
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
-
Multiple Languages Yes Yes
TTY/TDD (Digital) Yes Yes
Alerts
Extra Display Yes Yes
Ringer Profiles - Yes
Connectivity
Bluetooth Yes Yes
USB Yes Yes
Contacts
Picture ID Yes Yes
Ringer ID Yes Yes
Voice Dialing Yes Yes
Customization
Custom Graphics Yes Yes
Custom Ringtones Yes Yes
Real-Music Ringers Yes Yes
Data & Network
Data Tethering Yes Yes
WAP / Web Browser Yes Yes
Input
Predictive Text Entry Yes Yes
Side Keys Yes Yes
Memory
Memory Card Slot Yes Yes
Messaging
Email Client Yes Yes
Instant Messaging Yes -
MMS Yes Yes
Text Messaging Templates Yes Yes
Music
FM Radio - Yes
Music Player Yes Yes
Productivity
Alarm Yes Yes
Calculator Yes Yes
Calendar Yes Yes
To-Do List - Yes
Voice Memo Yes Yes
Software
BREW Yes -
Games Yes Yes
Java (J2ME) - Yes
Voice
Headset Jack (2.5 mm) Yes -
Push-To-Talk Yes Yes *
Speaker Phone Yes Yes
  * Some versions only
  Casio G'zOne Rock Sony Ericsson Z550a
  X > < X

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

 
Phone Casio G'zOne Rock Sony Ericsson Z550a

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