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Phone Siemens C56 Samsung Knack U310 Siemens CT66 / C66 / C65 / C71 / C70
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 2.2" diag.
4 : 3
?
Display Resolution & Type 101 x 64 pixels 176 x 220 pixels
(~128 ppi)
LCD (TFT/TFD)
130 x 130 pixels
LCD (Color)
Display Refresh ? ? ?
Battery 700 mAh 1,000 mAh 600 mAh
Processor ? ? ?
RAM ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware
Main Camera - - Yes
Wide Camera - - -
Tele Camera - - -
Video Capture - - -
Front Camera - - -
Weight 3 oz
(85g)
3.63 oz
(103g)
3 oz
(85g)
Dimensions 3.98" x 1.73" x 0.83"
(101 x 44 x 21.1 mm)
3.78" x 2.01" x 0.74"
(96 x 51 x 18.8 mm)
4.1" x 1.8" x 0.7"
(104 x 46 x 17.8 mm)
Form Factor Slab Clamshell Slab
Platform / OS (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 850, 1900

CDMA: 850, 1900

GSM: 850, 1800, 1900

*

Data Technology GPRS - GPRS
Features 
GPS / Location Yes Yes -
Accessibility
Adjustable Text Size - Yes -
Hearing Aid Compatible - Yes
M4, T4 (very tele-coil compatible)
-
Multiple Languages Yes Yes Yes
TTY/TDD (Digital) Yes Yes -
Alerts
Extra Display - Yes -
Ringer Profiles Yes - Yes
Connectivity
Infrared (IR) - - Yes
USB Yes - Yes
Contacts
Picture ID - - Yes
Ringer ID Yes - Yes
Voice Dialing Yes Yes -
Customization
Changeable Body Plates Yes - Yes
Custom Graphics Yes - Yes
Custom Ringtones Yes - Yes
Data & Network
Data Tethering Yes - -
WAP / Web Browser Yes - Yes
Input
Predictive Text Entry Yes Yes Yes
Side Keys - Yes -
Messaging
EMS / Picture Messaging Yes Yes Yes
MMS - - Yes
Text Messaging Templates Yes - Yes
Productivity
Alarm Yes Yes Yes
Calculator Yes Yes Yes
Calendar Yes Yes Yes
To-Do List - - Yes
Voice Memo - - Yes
Software
Games Yes - Yes
Java (J2ME) Yes - Yes
Voice
Call Screening - - Yes
Headset Jack (2.5 mm) - Yes -
Push-To-Talk - - Yes *
Speaker Phone Yes Yes Yes
  * Some versions only
  Siemens C56 Samsung Knack U310 Siemens CT66 / C66 / C65 / C71 / C70
  X > < X > < X

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

 
Phone Siemens C56 Samsung Knack U310 Siemens CT66 / C66 / C65 / C71 / C70

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