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Phone Nokia Lumia 521 / 520 Sony Xperia Z2 HTC Desire 555 Ericsson T66 Nokia 2651
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
5.2" diag.
16 : 9
5" diag.
16 : 9
? ?
Display Resolution & Type 480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
1080 x 1920 pixels
(~424 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~294 ppi)
LCD (TFT/TFD)
? 128 x 128 pixels
LCD (STN)
Display Refresh ? 60 Hz 60 Hz ? ?
Battery 1,430 mAh 3,200 mAh 2,200 mAh ? 760 mAh
Processor 1 GHz Qualcomm Snapdragon S4 MSM8270 2.3 GHz Qualcomm Snapdragon 801 MSM8974AB 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) ? ?
RAM 512 MB 3 GB 2 GB ? ?
Storage 8 GB 16 GB 16 GB ? raw hardware ? raw hardware
Main Camera 5 megapixel 20 megapixel 8 megapixel - -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture 720p HD 4K UHD 720p HD - -
Front Camera - 2 megapixel 5 megapixel - -
Weight 4.39 oz
(124g)
5.75 oz
(163g)
4.93 oz
(140g)
2.08 oz
(59g)
3.4 oz
(96g)
Dimensions 4.72" x 2.52" x 0.39"
(120 x 64 x 9.9 mm)
5.78" x 2.89" x 0.32"
(147 x 73 x 8.2 mm)
5.78" x 2.79" x 0.33"
(147 x 71 x 8.4 mm)
3.62" x 1.61" x 0.69"
(92 x 41 x 17.5 mm)
3.35" x 1.81" x 0.9"
(85 x 46 x 22.9 mm)
Form Factor Slab Slab Slab Slab Clamshell
Platform / OS Windows Android Android (proprietary) (proprietary)
Network Bands

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

4G LTE: 1, 2, 3, 4, 5, 7, 8, 13, 17

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 12

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

GSM: 900, 1800, 1900

GSM: 850, 1900

Data Technology HSPA+ 21 LTE (Cat 4) LTE (Cat 4) - GPRS
Features 
Flashlight - - Yes - -
GPS / Location n/a n/a n/a - -
Ruggedized - Yes - - -
Water-Resistant - Yes
IPX8 (SCUBA)
- - -
Accessibility
Adjustable Text Size n/a n/a n/a - -
Hearing Aid Compatible Yes - Yes * - -
Multiple Languages n/a n/a n/a Yes Yes
TTY/TDD (Digital) Yes Yes Yes - -
Alerts
Ringer Profiles - - - Yes -
Connectivity
Bluetooth Yes Yes
Classic Audio
Yes
Classic Audio
- -
Mobile Hotspot n/a n/a n/a - -
NFC - Yes - - -
USB Yes Yes
Micro-USB
Yes
Micro-USB
- -
Wi-Fi Yes Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID n/a n/a n/a - -
Ringer ID n/a n/a n/a - -
Voice Dialing n/a n/a n/a - -
Customization
Custom Graphics n/a n/a n/a Yes Yes
Custom Ringtones n/a n/a n/a Yes Yes
Real-Music Ringers n/a n/a n/a - -
Data & Network
Data Tethering n/a n/a n/a - -
WAP / Web Browser n/a n/a n/a Yes Yes
Input
Predictive Text Entry n/a n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes -
Touch Screen Yes Yes Yes - -
Memory
Memory Card Slot Yes Yes Yes - -
Messaging
Email Client n/a n/a n/a - Yes
EMS / Picture Messaging n/a n/a n/a Yes Yes
Instant Messaging n/a n/a n/a - -
MMS n/a n/a n/a - Yes
Text Messaging Templates n/a n/a n/a Yes -
Music
FM Radio - Yes Yes - -
Headphone Jack (3.5mm) Yes Yes Yes - -
Music Player n/a n/a n/a - -
Photo & Video
DLNA - Yes Yes - -
Miracast - Yes Yes - -
TV Output - Yes - - -
Productivity
Alarm n/a n/a n/a Yes Yes
Calculator n/a n/a n/a Yes Yes
Calendar n/a n/a n/a Yes Yes
To-Do List n/a n/a n/a Yes -
Voice Memo n/a n/a n/a - -
Software
Games n/a n/a n/a Yes Yes
Java (J2ME) n/a n/a n/a - Yes
Voice
HD Voice - - Yes - -
Speaker Phone Yes Yes Yes - -
  * Some versions only
  Nokia Lumia 521 / 520 Sony Xperia Z2 HTC Desire 555 Ericsson T66 Nokia 2651
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Nokia Lumia 521 / 520 Sony Xperia Z2 HTC Desire 555 Ericsson T66 Nokia 2651

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