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Phone ZTE Agent Pantech Duo C810 Samsung SGH-X640 Ericsson T66
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
2.2" diag.
4 : 3
? ?
Display Resolution & Type 240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
?
Display Refresh ? ? ? ?
Battery 900 mAh 1,320 mAh 800 mAh ?
Processor ? ARM 920t PXA27x ? ?
RAM ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera 1 megapixel 1 megapixel Yes -
Wide Camera - - - -
Tele Camera - - - -
Video Capture ? QVGA (320 x 240) - -
Front Camera - - - -
Weight 3.53 oz
(100g)
3.88 oz
(110g)
3 oz
(85g)
2.08 oz
(59g)
Dimensions 4.3" x 1.9" x 0.6"
(109 x 48 x 15.2 mm)
4.01" x 1.97" x 0.78"
(102 x 50 x 19.8 mm)
3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.62" x 1.61" x 0.69"
(92 x 41 x 17.5 mm)
Form Factor Slab Slide Clamshell Slab
Platform / OS (proprietary) Windows Mobile Standard (proprietary) (proprietary)
Network Bands

CDMA: 850, 1700, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

GSM: 900, 1800, 1900

GSM: 900, 1800, 1900

Data Technology 1xRTT HSDPA 1.8 GPRS -
Features 
GPS / Location Yes n/a - -
Accessibility
Hearing Aid Compatible Yes
M4, T4 (very tele-coil compatible)
- - -
Multiple Languages Yes n/a Yes Yes
TTY/TDD (Digital) Yes - - -
Alerts
Ringer Profiles - Yes - Yes
Connectivity
Bluetooth Yes Yes - -
USB Yes
Micro-USB
Yes - -
Contacts
Picture ID - n/a Yes -
Ringer ID Yes n/a Yes -
Voice Dialing - n/a - -
Customization
Custom Graphics Yes n/a Yes Yes
Custom Ringtones Yes n/a Yes Yes
Real-Music Ringers Yes n/a - -
Data & Network
Data Tethering - n/a - -
WAP / Web Browser Yes n/a Yes Yes
Input
Predictive Text Entry Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - Yes - -
Memory
Memory Card Slot Yes Yes - -
Messaging
Email Client Yes n/a - -
EMS / Picture Messaging - n/a Yes Yes
Instant Messaging Yes n/a - -
MMS Yes n/a Yes -
Text Messaging Templates Yes n/a Yes Yes
Music
Headphone Jack (3.5mm) Yes - - -
Music Player Yes n/a - -
Productivity
Alarm Yes n/a Yes Yes
Calculator Yes n/a Yes Yes
Calendar Yes n/a Yes Yes
To-Do List - n/a Yes Yes
Voice Memo Yes n/a Yes -
Software
BREW Yes n/a - -
Games Yes n/a Yes Yes
Java (J2ME) - n/a Yes -
Voice
Headset Jack (2.5 mm) - n/a Yes -
Speaker Phone Yes Yes Yes -
  ZTE Agent Pantech Duo C810 Samsung SGH-X640 Ericsson T66
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone ZTE Agent Pantech Duo C810 Samsung SGH-X640 Ericsson T66

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