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Phone Nokia 1661 Motorola E398 Siemens CF75 Motorola i450 / i455
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Not yet released Released
Specifications 
Display Size 1.8" diag.
4 : 3
? ? ?
Display Resolution & Type 128 x 160 pixels
(~114 ppi)
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (STN)
130 x 130 pixels
LCD (STN)
Display Refresh ? ? ? ?
Battery 860 mAh ? 600 mAh ?
Processor ? ? ? ?
RAM ? ? ? ?
Storage ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera - Yes Yes -
Wide Camera - - - -
Tele Camera - - - -
Video Capture - - - -
Front Camera - - - -
Weight 2.9 oz
(82g)
3.88 oz
(110g)
3.17 oz
(90g)
4.5 oz
(128g)
Dimensions 4.25" x 1.8" x 0.53"
(108 x 46 x 13.5 mm)
4.25" x 1.81" x 0.81"
(108 x 46 x 20.6 mm)
3.43" x 1.73" x 1.26"
(87 x 44 x 32 mm)
3.5" x 2" x 1.1"
(89 x 51 x 27.9 mm)
Form Factor Slab Slab Clamshell Clamshell
Platform / OS (proprietary) (proprietary) (proprietary) (proprietary)
Network Bands

GSM: 850, 1900

GSM: 900, 1800, 1900

*

GSM: 900, 1800, 1900

iDEN: 800

Data Technology - GPRS EDGE -
Features 
Flashlight Yes - - -
GPS / Location - - - Yes
Accessibility
Hearing Aid Compatible - - - Yes
Multiple Languages - Yes Yes Yes
TTY/TDD (Digital) - Yes - Yes
Alerts
Extra Display - - Yes Yes
Ringer Profiles Yes Yes - Yes
Connectivity
Bluetooth - Yes - -
Infrared (IR) - - Yes -
USB - Yes Yes Yes
Contacts
Picture ID - Yes - Yes
Ringer ID - Yes - Yes
Voice Dialing - Yes - Yes
Customization
Custom Graphics - Yes Yes Yes
Custom Ringtones - Yes Yes Yes
Real-Music Ringers - Yes - Yes *
Data & Network
Data Tethering - Yes Yes Yes
WAP / Web Browser - Yes Yes Yes
Input
Predictive Text Entry Yes Yes Yes Yes
Side Keys - Yes Yes Yes
Memory
Memory Card Slot - Yes - -
Messaging
Email Client - Yes Yes -
EMS / Picture Messaging - Yes Yes -
Instant Messaging - Yes - -
MMS - Yes Yes Yes
Text Messaging Templates - - Yes Yes
Music
FM Radio Yes - - -
Music Player - Yes - -
Stereo Speakers - Yes - -
Productivity
Alarm Yes Yes Yes -
Calculator Yes Yes Yes -
Calendar Yes Yes Yes Yes
To-Do List - - Yes -
Voice Memo Yes Yes Yes Yes
Software
Games Yes Yes * Yes Yes
Java (J2ME) - Yes Yes Yes
Voice
Headset Jack (2.5 mm) Yes Yes - Yes
Push-To-Talk - - Yes Yes
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Nokia 1661 Motorola E398 Siemens CF75 Motorola i450 / i455
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Nokia 1661 Motorola E398 Siemens CF75 Motorola i450 / i455

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