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Phone Samsung M520 ZTE Z221 Samsung Galaxy S II Skyrocket Motorola i560
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.1" diag.
4 : 3
2" diag.
4 : 3
4.5" diag.
5 : 3
?
Display Resolution & Type 176 x 220 pixels
(~134 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~200 ppi)
LCD (TFT/TFD)
480 x 800 pixels
(~207 ppi)
AMOLED
130 x 130 pixels
LCD (STN)
Display Refresh ? ? 60 Hz ?
Battery ? 900 mAh 1,850 mAh 750 mAh
Processor ? ? 1.5 GHz Qualcomm Snapdragon S3 APQ8060 ?
RAM ? ? 1 GB ?
Storage ? raw hardware 142 MB 16 GB ? raw hardware
Main Camera 1 megapixel Yes 8 megapixel -
Wide Camera - - - -
Tele Camera - - - -
Video Capture ? QCIF (176 x 144) 1080p HD -
Front Camera - - 2 megapixel -
Weight 2.75 oz
(78g)
3.24 oz
(92g)
4.71 oz
(133g)
4.6 oz
(130g)
Dimensions 4.01" x 2.04" x 0.5"
(102 x 52 x 12.7 mm)
3.76" x 1.92" x 0.73"
(96 x 49 x 18.5 mm)
5.12" x 2.72" x 0.35"
(130 x 69 x 9 mm)
3.5" x 2.1" x 1.14"
(89 x 53 x 29 mm)
Form Factor Slide Clamshell Slab Clamshell
Platform / OS (proprietary) (proprietary) Android (proprietary)
Network Bands

CDMA: 850, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

4G LTE: 4, 17

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

iDEN: 800

Data Technology EVDO r0 HSDPA 3.6 LTE (Cat 3) -
Features 
GPS / Location Yes Yes n/a Yes
Ruggedized - - - Yes
Accessibility
Hearing Aid Compatible Yes Yes Yes Yes
Multiple Languages Yes Yes n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes
Alerts
Extra Display - Yes - Yes
Ringer Profiles - Yes - Yes
Connectivity
Bluetooth Yes Yes Yes -
Mobile Hotspot - - n/a -
NFC - - Yes -
USB Yes Yes Yes
Micro-USB
-
Wi-Fi - - Yes
4 (802.11 a,b,g,n)
-
Contacts
Picture ID Yes - n/a -
Ringer ID Yes - n/a Yes
Voice Dialing Yes - n/a Yes
Customization
Custom Graphics Yes Yes n/a Yes
Custom Ringtones Yes Yes n/a Yes
Real-Music Ringers - Yes n/a -
Data & Network
Data Tethering Yes - n/a Yes
WAP / Web Browser Yes Yes n/a Yes
Input
Predictive Text Entry Yes Yes n/a Yes
Side Keys Yes Yes Yes Yes
Touch Screen - - Yes -
Memory
Memory Card Slot Yes - Yes -
Messaging
Email Client - Yes n/a -
Instant Messaging - Yes n/a -
MMS - Yes n/a Yes
Text Messaging Templates Yes Yes n/a Yes
Music
Headphone Jack (3.5mm) - - Yes -
Music Player Yes - n/a -
Photo & Video
DLNA - - Yes -
TV Output - - Yes -
Productivity
Alarm Yes Yes n/a -
Calculator Yes Yes n/a -
Calendar Yes Yes n/a Yes
To-Do List Yes - n/a -
Voice Memo Yes Yes n/a Yes
Software
Games Yes Yes n/a Yes
Java (J2ME) Yes Yes n/a Yes
Voice
Headset Jack (2.5 mm) - - n/a Yes
Push-To-Talk - - - Yes
Speaker Phone Yes Yes Yes Yes
  Samsung M520 ZTE Z221 Samsung Galaxy S II Skyrocket Motorola i560
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung M520 ZTE Z221 Samsung Galaxy S II Skyrocket Motorola i560

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