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Phone Siemens CT56 Samsung SCH-A990 Nuu F4L Samsung SGH-X640 Samsung SGH-P850 / P858
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Not yet released Released Released
Specifications 
Display Size ? ? 2.8" diag.
4 : 3
? ?
Display Resolution & Type 101 x 64 pixels 240 x 320 pixels
LCD (TFT/TFD)
240 x 320 pixels
(~143 ppi)
LCD (STN)
128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
Display Refresh ? ? 60 Hz ? ?
Battery 700 mAh 1,000 mAh 1,350 mAh 800 mAh 950 mAh
Processor ? ? 1.1 GHz MediaTek MT6731 ? ?
RAM ? ? 512 MB ? ?
Storage ? raw hardware ? raw hardware 4 GB ? raw hardware ? raw hardware
Main Camera - 3 megapixel 2 megapixel Yes 3 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - ? 720p HD - ?
Front Camera - - Yes - -
Weight 2.96 oz
(84g)
4.4 oz
(125g)
4.5 oz
(128g)
3 oz
(85g)
4.23 oz
(120g)
Dimensions 3.98" x 1.73" x 0.83"
(101 x 44 x 21.1 mm)
3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
4.31" x 2.27" x 0.83"
(109 x 58 x 21 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.77" x 1.86" x 0.96"
(96 x 47 x 24.4 mm)
Form Factor Slab Clamshell Clamshell Clamshell Clamshell
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 850, 1900

CDMA: 850, 1900

4G LTE: 2, 4, 5, 12, 13, 66

WCDMA: 2, 4, 5

GSM: 850, 1900

GSM: 900, 1800, 1900

GSM: 900, 1800, 1900

Data Technology GPRS EVDO r0 LTE (Cat 4) GPRS EDGE
Features 
Flashlight - Yes Yes - -
GPS / Location Yes Yes Yes - -
Accessibility
Adjustable Text Size - - Yes - -
Hearing Aid Compatible - Yes
M3 (mostly compatible)
Yes
M4, T4 (very tele-coil compatible)
- -
Multiple Languages Yes Yes Yes Yes Yes
TTY/TDD (Digital) Yes Yes Yes - -
Alerts
Extra Display - Yes Yes - Yes
Connectivity
Bluetooth - Yes Yes - Yes
USB Yes Yes Yes
Micro-USB
- Yes
Wi-Fi - - Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID - Yes Yes Yes Yes
Ringer ID - Yes Yes Yes Yes
Voice Dialing Yes Yes - - -
Customization
Changeable Body Plates Yes - - - -
Custom Graphics Yes Yes Yes Yes Yes
Custom Ringtones Yes Yes - Yes Yes
Real-Music Ringers - Yes - - Yes
Data & Network
Data Tethering Yes Yes - - -
WAP / Web Browser Yes Yes Yes Yes Yes
Input
Predictive Text Entry Yes Yes Yes Yes Yes
Side Keys - Yes Yes Yes Yes
Memory
Memory Card Slot - Yes Yes - Yes
Messaging
Email Client - - Yes - Yes
EMS / Picture Messaging Yes Yes - Yes -
Instant Messaging - - Yes - -
MMS - Yes Yes Yes Yes
Text Messaging Templates - Yes Yes Yes Yes
Music
FM Radio - - Yes - -
Headphone Jack (3.5mm) - - Yes - -
Music Player - Yes Yes - Yes
Stereo Speakers - Yes - - Yes
Photo & Video
TV Output - Yes - - Yes
Productivity
Alarm - Yes Yes Yes Yes
Calculator - Yes Yes Yes Yes
Calendar - Yes Yes Yes Yes
To-Do List - - - Yes -
Voice Memo - Yes Yes Yes Yes
Software
BREW - Yes - - -
Games - Yes - Yes Yes
Java (J2ME) Yes - - Yes Yes
Voice
HD Voice - - Yes - -
Headset Jack (2.5 mm) - - - Yes -
Speaker Phone Yes Yes Yes Yes Yes
  Siemens CT56 Samsung SCH-A990 Nuu F4L Samsung SGH-X640 Samsung SGH-P850 / P858
  X > < X > < X > < X > < X

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

 
Phone Siemens CT56 Samsung SCH-A990 Nuu F4L Samsung SGH-X640 Samsung SGH-P850 / P858

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