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Phone Nokia Lumia 521 / 520 Siemens M75 Palm Pre 2 (GSM) Samsung SGH-X820 Ericsson T66
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Not yet released Released Released Released
Specifications 
Display Size 4" diag.
5 : 3
? 3.1" diag.
5 : 3
? ?
Display Resolution & Type 480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
132 x 176 pixels
LCD (TFT/TFD)
320 x 480 pixels
(~186 ppi)
LCD (TFT/TFD)
220 x 176 pixels
LCD (TFT/TFD)
?
Display Refresh ? ? ? ? ?
Battery 1,430 mAh 750 mAh 1,150 mAh 650 mAh ?
Processor 1 GHz Qualcomm Snapdragon S4 MSM8270 ? 1 GHz TI 3630 ? ?
RAM 512 MB ? ? ? ?
Storage 8 GB ? raw hardware ? raw hardware ? raw hardware ? raw hardware
Main Camera 5 megapixel 1 megapixel 5 megapixel 2 megapixel -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture 720p HD ? VGA (640 x 480) ? -
Front Camera - - - - -
Weight 4.39 oz
(124g)
3.88 oz
(110g)
5.1 oz
(145g)
2.33 oz
(66g)
2.08 oz
(59g)
Dimensions 4.72" x 2.52" x 0.39"
(120 x 64 x 9.9 mm)
4.35" x 2.03" x 0.82"
(110 x 52 x 20.8 mm)
3.96" x 2.35" x 0.67"
(101 x 60 x 17 mm)
4.45" x 1.97" x 0.27"
(113 x 50 x 6.9 mm)
3.62" x 1.61" x 0.69"
(92 x 41 x 17.5 mm)
Form Factor Slab Slab Slide Slab Slab
Platform / OS Windows (proprietary) webOS (proprietary) (proprietary)
Network Bands

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

GSM: 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

GSM: 900, 1800, 1900

GSM: 900, 1800, 1900

Data Technology HSPA+ 21 GPRS HSDPA 3.6 EDGE -
Features 
GPS / Location n/a - n/a - -
Ruggedized - Yes - - -
Accessibility
Hearing Aid Compatible Yes - - - -
Multiple Languages n/a Yes n/a Yes Yes
TTY/TDD (Digital) Yes - Yes - -
Alerts
Ringer Profiles - Yes - - Yes
Connectivity
Bluetooth Yes
Yes
Classic Audio
Yes
Classic Audio
Yes
Classic Audio
-
Infrared (IR) - Yes - - -
Mobile Hotspot n/a - n/a - -
USB Yes Yes Yes
Micro-USB
Yes -
Wi-Fi Yes - Yes
802.11 b,g
- -
Contacts
Picture ID n/a Yes n/a Yes -
Ringer ID n/a Yes n/a Yes -
Voice Dialing n/a - n/a - -
Customization
Custom Graphics n/a Yes n/a Yes Yes
Custom Ringtones n/a Yes n/a Yes Yes
Real-Music Ringers n/a - n/a Yes -
Data & Network
Data Tethering n/a Yes n/a - -
External Antenna Jack n/a - n/a Yes -
WAP / Web Browser n/a Yes n/a Yes Yes
Input
Predictive Text Entry n/a Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - Yes - -
Touch Screen Yes - Yes - -
Memory
Memory Card Slot Yes Yes - - -
Messaging
Email Client n/a Yes n/a Yes -
EMS / Picture Messaging n/a Yes n/a Yes Yes
Instant Messaging n/a - n/a - -
MMS n/a Yes n/a Yes -
Text Messaging Templates n/a - n/a Yes Yes
Music
Headphone Jack (3.5mm) Yes - Yes - -
Music Player n/a Yes n/a - -
Photo & Video
TV Output - - - Yes -
Productivity
Alarm n/a Yes n/a Yes Yes
Calculator n/a Yes n/a Yes Yes
Calendar n/a Yes n/a Yes Yes
To-Do List n/a Yes n/a Yes Yes
Voice Memo n/a Yes n/a Yes -
Software
Games n/a Yes n/a Yes Yes
Java (J2ME) n/a Yes n/a Yes -
Voice
Push-To-Talk - Yes - - -
Speaker Phone Yes Yes Yes Yes -
  Nokia Lumia 521 / 520 Siemens M75 Palm Pre 2 (GSM) Samsung SGH-X820 Ericsson T66
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Phone Nokia Lumia 521 / 520 Siemens M75 Palm Pre 2 (GSM) Samsung SGH-X820 Ericsson T66

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