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Phone ZTE Z221 BlackBerry 7750 Samsung Wafer R510 Samsung Sidekick 4G Nokia 7160
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2" diag.
4 : 3
? 1.9" diag.
4 : 3
3.5" diag.
5 : 3
?
Display Resolution & Type 240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
240 x 240 pixels
LCD (Color)
220 x 176 pixels
(~148 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~267 ppi)
LCD (TFT/TFD)
96 x 65 pixels
Display Refresh ? ? ? 60 Hz ?
Battery 900 mAh ? 800 mAh ? ?
Processor ? ? ? 1 GHz Samsung Hummingbird Cortex A8 ?
RAM ? ? ? ? ?
Storage 142 MB ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera Yes - 1 megapixel 3 megapixel -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture QCIF (176 x 144) - ? WVGA / 480p -
Front Camera - - - Yes -
Weight 3.24 oz
(92g)
5.01 oz
(142g)
2.47 oz
(70g)
5.7 oz
(162g)
4.9 oz
(139g)
Dimensions 3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
4.76" x 3.03" x 0.71"
(121 x 77 x 18 mm)
4.45" x 1.97" x 0.33"
(113 x 50 x 8.4 mm)
5" x 2.42" x 0.6"
(127 x 61 x 15.2 mm)
4.92" x 2.09" x 0.95"
(125 x 53 x 24.1 mm)
Form Factor Clamshell Slab Slab Slide Slide
Platform / OS (proprietary) BlackBerry OS (proprietary) Android (proprietary)
Network Bands

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

CDMA: 850, 1900

WCDMA: 1, 4

GSM: 850, 900, 1800, 1900

TDMA: 850, 1900

AMPS: 850

Data Technology HSDPA 3.6 1xRTT EVDO r0 HSPA+ 21 -
Features 
GPS / Location Yes n/a Yes n/a -
Accessibility
Hearing Aid Compatible Yes - Yes Yes -
Multiple Languages Yes n/a Yes n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes -
Alerts
Extra Display Yes - - - -
Ringer Profiles Yes Yes - - Yes
Connectivity
Bluetooth Yes - Yes Yes -
Infrared (IR) - - - - Yes
Mobile Hotspot - n/a - n/a -
USB Yes Yes - Yes
Micro-USB
-
Wi-Fi - - - Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID - n/a Yes n/a -
Ringer ID - n/a - n/a -
Voice Dialing - n/a Yes n/a Yes
Customization
Custom Graphics Yes n/a Yes n/a -
Custom Ringtones Yes n/a Yes n/a Yes
Real-Music Ringers Yes n/a - n/a -
Data & Network
Data Tethering - n/a - n/a Yes
WAP / Web Browser Yes n/a Yes n/a Yes
Input
Predictive Text Entry Yes n/a Yes n/a Yes
Side Keys Yes Yes Yes Yes -
Text Keyboard, Hardware - Yes - Yes -
Touch Screen - - - Yes -
Memory
Memory Card Slot - - Yes Yes -
Messaging
Email Client Yes n/a - n/a -
Instant Messaging Yes n/a - n/a -
MMS Yes n/a Yes n/a -
Text Messaging Templates Yes n/a - n/a -
Music
Headphone Jack (3.5mm) - - - Yes -
Music Player - n/a Yes n/a -
Stereo Speakers - - Yes - -
Photo & Video
DLNA - - - Yes -
Productivity
Alarm Yes n/a Yes n/a Yes
Calculator Yes n/a Yes n/a Yes
Calendar Yes n/a Yes n/a Yes
To-Do List - n/a - n/a Yes
Voice Memo Yes n/a Yes n/a -
Software
BREW - n/a Yes n/a -
Games Yes n/a Yes n/a Yes
Java (J2ME) Yes n/a - n/a -
Voice
Headset Jack (2.5 mm) - n/a - n/a -
Speaker Phone Yes - Yes Yes -
  ZTE Z221 BlackBerry 7750 Samsung Wafer R510 Samsung Sidekick 4G Nokia 7160
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone ZTE Z221 BlackBerry 7750 Samsung Wafer R510 Samsung Sidekick 4G Nokia 7160

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