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Phone Samsung UpStage M620 ZTE Aspect Pantech Duo C810 Siemens CT66 / C66 / C65 / C71 / C70
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.1" diag.
4 : 3
2.4" diag.
4 : 3
2.2" diag.
4 : 3
?
Display Resolution & Type 176 x 220 pixels
(~134 ppi)
LCD (TFT/TFD)
320 x 240 pixels
(~167 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
130 x 130 pixels
LCD (Color)
Display Refresh ? ? ? ?
Battery 620 mAh 1,000 mAh 1,320 mAh 600 mAh
Processor ? 230 MHz Qualcomm QSC6270 ARM 920t PXA27x ?
RAM ? 128 MB ? ?
Storage ? raw hardware 256 MB ? raw hardware ? raw hardware
Main Camera 1 megapixel 2 megapixel 1 megapixel Yes
Wide Camera - - - -
Tele Camera - - - -
Video Capture ? QVGA (320 x 240) QVGA (320 x 240) -
Front Camera - - - -
Weight 2.57 oz
(73g)
3.7 oz
(105g)
3.88 oz
(110g)
3 oz
(85g)
Dimensions 4.07" x 1.73" x 0.37"
(103 x 44 x 9.4 mm)
4.55" x 2.4" x 0.45"
(116 x 61 x 11.4 mm)
4.01" x 1.97" x 0.78"
(102 x 50 x 19.8 mm)
4.1" x 1.8" x 0.7"
(104 x 46 x 17.8 mm)
Form Factor Slab Slab Slide Slab
Platform / OS (proprietary) (proprietary) Windows Mobile Standard (proprietary)
Network Bands

CDMA: 850, 1900

WCDMA: 2, 4

GSM: 850, 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

GSM: 850, 1800, 1900

*

Data Technology EVDO r0 WCDMA (UMTS) HSDPA 1.8 GPRS
Features 
GPS / Location - Yes n/a -
Accessibility
Adjustable Text Size Yes - n/a -
Hearing Aid Compatible Yes
M4 (very compatible)
Yes
M3, T3 (mostly tele-coil compatible)
- -
Multiple Languages - Yes n/a Yes
TTY/TDD (Digital) Yes Yes - -
Alerts
Extra Display Yes - - -
Ringer Profiles - Yes Yes Yes
Connectivity
Bluetooth Yes Yes Yes -
Infrared (IR) - - - Yes
USB Yes Yes
Micro-USB
Yes Yes
Contacts
Picture ID Yes Yes n/a Yes
Ringer ID Yes Yes n/a Yes
Voice Dialing Yes - n/a -
Customization
Changeable Body Plates - - - Yes
Custom Graphics Yes Yes n/a Yes
Custom Ringtones Yes Yes n/a Yes
Real-Music Ringers Yes Yes n/a -
Data & Network
Data Tethering - - n/a -
External Antenna Jack Yes - n/a -
WAP / Web Browser Yes Yes n/a Yes
Input
Predictive Text Entry Yes Yes n/a Yes
Side Keys Yes Yes Yes -
Text Keyboard, Hardware - Yes Yes -
Memory
Memory Card Slot Yes Yes Yes -
Messaging
Email Client - Yes n/a -
EMS / Picture Messaging - - n/a Yes
Instant Messaging Yes - n/a -
MMS Yes Yes n/a Yes
Text Messaging Templates Yes Yes n/a Yes
Music
Headphone Jack (3.5mm) - Yes - -
Music Player Yes Yes n/a -
Productivity
Alarm Yes Yes n/a Yes
Calculator Yes Yes n/a Yes
Calendar Yes Yes n/a Yes
To-Do List Yes - n/a Yes
Voice Memo Yes Yes n/a Yes
Software
Games Yes Yes n/a Yes
Java (J2ME) Yes Yes n/a Yes
Voice
Call Screening - - - Yes
Push-To-Talk - - - Yes *
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Samsung UpStage M620 ZTE Aspect Pantech Duo C810 Siemens CT66 / C66 / C65 / C71 / C70
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung UpStage M620 ZTE Aspect Pantech Duo C810 Siemens CT66 / C66 / C65 / C71 / C70

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