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Phone Nokia 1661 ZTE Engage LT / Engage MT Samsung SCH-U430 Samsung Knack U310 Siemens CX75
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Not yet released
Specifications 
Display Size 1.8" diag.
4 : 3
4" diag.
5 : 3
? 2.2" diag.
4 : 3
?
Display Resolution & Type 128 x 160 pixels
(~114 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
176 x 220 pixels
(~128 ppi)
LCD (TFT/TFD)
132 x 176 pixels
LCD (TFT/TFD)
Display Refresh ? 60 Hz ? ? ?
Battery 860 mAh 1,900 mAh 1,000 mAh 1,000 mAh 750 mAh
Processor ? ? ? ? ?
RAM ? 1 GB ? ? ?
Storage ? raw hardware 4 GB ? raw hardware ? raw hardware ? raw hardware
Main Camera - 3 megapixel Yes - 1 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - WVGA / 480p - - ?
Front Camera - Yes - - -
Weight 2.9 oz
(82g)
5.09 oz
(144g)
3.21 oz
(91g)
3.63 oz
(103g)
3.46 oz
(98g)
Dimensions 4.25" x 1.8" x 0.53"
(108 x 46 x 13.5 mm)
4.78" x 2.54" x 0.46"
(121 x 64 x 11.7 mm)
3.67" x 1.85" x 0.78"
(93 x 47 x 19.8 mm)
3.78" x 2.01" x 0.74"
(96 x 51 x 18.8 mm)
4.33" x 1.88" x 0.74"
(110 x 48 x 18.8 mm)
Form Factor Slab Slab Clamshell Clamshell Slab
Platform / OS (proprietary) Android (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 850, 1900

CDMA: 850, 1700, 1900

CDMA: 850, 1900

CDMA: 850, 1900

GSM: 900, 1800, 1900

Data Technology - EVDO rA 1xRTT - GPRS
Features 
Flashlight Yes - - - -
GPS / Location - n/a Yes Yes -
Accessibility
Adjustable Text Size - n/a Yes Yes -
Hearing Aid Compatible - - Yes Yes -
Multiple Languages - n/a Yes Yes Yes
TTY/TDD (Digital) - Yes Yes Yes -
Alerts
Extra Display - - Yes Yes -
Ringer Profiles Yes - - - Yes
Connectivity
Bluetooth - Yes
Classic Audio
Yes
Classic Audio
- Yes
Classic Audio
Infrared (IR) - - - - Yes
USB - Yes
Micro-USB
- - Yes
Wi-Fi - Yes - - -
Contacts
Picture ID - n/a Yes - Yes
Ringer ID - n/a Yes - Yes
Voice Dialing - n/a Yes Yes -
Customization
Custom Graphics - n/a Yes - Yes
Custom Ringtones - n/a Yes - Yes
Real-Music Ringers - n/a - - -
Data & Network
Data Tethering - n/a - - Yes
WAP / Web Browser - n/a Yes - Yes
Input
Predictive Text Entry Yes n/a Yes Yes Yes
Side Keys - Yes Yes Yes Yes
Touch Screen - Yes - - -
Memory
Memory Card Slot - Yes - - Yes
Messaging
Email Client - n/a Yes - Yes
EMS / Picture Messaging - n/a Yes Yes Yes
Instant Messaging - n/a Yes - -
MMS - n/a Yes - Yes
Text Messaging Templates - n/a Yes - -
Music
FM Radio Yes - - - -
Headphone Jack (3.5mm) - Yes - - -
Music Player - n/a - - Yes
Productivity
Alarm Yes n/a Yes Yes Yes
Calculator Yes n/a Yes Yes Yes
Calendar Yes n/a Yes Yes Yes
To-Do List - n/a - - Yes
Voice Memo Yes n/a Yes - Yes
Software
BREW - n/a Yes - -
Games Yes n/a Yes - Yes
Java (J2ME) - n/a - - Yes
Voice
Headset Jack (2.5 mm) Yes n/a Yes Yes -
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  Nokia 1661 ZTE Engage LT / Engage MT Samsung SCH-U430 Samsung Knack U310 Siemens CX75
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Phone Nokia 1661 ZTE Engage LT / Engage MT Samsung SCH-U430 Samsung Knack U310 Siemens CX75

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