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Phone Casio Exilim C721 ZTE Z331
Current U.S. Carriers (none) (none)
Global Availability Released Released
Specifications 
Display Size 2.3" diag.
4 : 3
2.4" diag.
4 : 3
Display Resolution & Type 240 x 320 pixels
(~174 ppi)
LCD (TFT/TFD)
176 x 220 pixels
(~117 ppi)
LCD (TFT/TFD)
Display Refresh ? ?
Battery 920 mAh 950 mAh
Processor ? ?
RAM ? ?
Storage ? raw hardware ? raw hardware
Main Camera 5 megapixel 3 megapixel
Wide Camera - -
Tele Camera - -
Video Capture QVGA (320 x 240) QCIF (176 x 144)
Front Camera - -
Weight 4.48 oz
(127g)
4 oz
(113g)
Dimensions 4.06" x 1.97" x 0.78"
(103 x 50 x 19.9 mm)
3.84" x 2.02" x 0.69"
(98 x 51 x 17.5 mm)
Form Factor Clamshell Clamshell
Platform / OS (proprietary) (proprietary)
Network Bands

CDMA: 850, 1900

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

Data Technology EVDO rA HSDPA 3.6
Features 
Flashlight Yes -
GPS / Location Yes Yes
Ruggedized Yes -
Water-Resistant Yes -
Accessibility
Adjustable Text Size Yes -
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
Yes
M3, 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
Micro-USB
Contacts
Picture ID Yes Yes
Ringer ID Yes Yes
Voice Dialing 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
EMS / Picture Messaging Yes -
Instant Messaging Yes Yes
MMS Yes Yes
Text Messaging Templates Yes Yes
Music
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
Speaker Phone Yes Yes
  Casio Exilim C721 ZTE Z331
  X > < X

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

 
Phone Casio Exilim C721 ZTE Z331

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