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Phone	Nokia Lumia 521 / 520	HTC Droid Eris	Huawei W1	Motorola KRZR K1m	Sony Ericsson K850
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4" diag. 5 : 3	3.2" diag. 5 : 3	4" diag. 5 : 3	?	2.2" diag. 4 : 3
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	320 x 480 pixels (~180 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	176 x 220 pixels LCD (TFT/TFD)	240 x 320 pixels (~182 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	?
Battery	1,430 mAh	1,300 mAh	1,950 mAh	880 mAh	?
Processor	1 GHz Qualcomm Snapdragon S4 MSM8270	528 MHz MSM7600	1.2 GHz Qualcomm Snapdragon 400 MSM8230	?	?
RAM	512 MB	?	512 MB	?	?
Storage	8 GB	? raw hardware	4 GB	? raw hardware	? raw hardware
Main Camera	5 megapixel	5 megapixel	5 megapixel	1 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	CIF (352 x 288)	720p HD	?	?
Front Camera	-	-	Yes	-	-
Weight	4.39 oz (124g)	4.43 oz (126g)	4.41 oz (125g)	3.63 oz (103g)	4.2 oz (119g)
Dimensions	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	4.45" x 2.19" x 0.52" (113 x 55 x 13.2 mm)	4.84" x 2.5" x 0.41" (123 x 64 x 10.4 mm)	4.06" x 1.73" x 0.67" (103 x 44 x 17 mm)	4" x 1.9" x 0.7" (102 x 48 x 17.8 mm)
Form Factor	Slab	Slab	Slab	Clamshell	Slab
Platform / OS	Windows	Android	Windows	(proprietary)	(proprietary)
Network Bands	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	HSPA+ 21	EVDO rA	HSPA+ 21	EVDO r0	HSDPA 3.6
Features
GPS / Location	n/a	n/a	n/a	Yes	-
Accessibility
Adjustable Text Size	n/a	n/a	n/a	-	-
Hearing Aid Compatible	Yes	Yes	Yes	Yes	-
Multiple Languages	n/a	n/a	n/a	Yes	Yes
TTY/TDD (Digital)	Yes	Yes	-	Yes	Yes
Alerts
Extra Display	-	-	-	Yes	-
Ringer Profiles	-	-	-	Yes	Yes
Connectivity
Bluetooth	Yes	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio
Mobile Hotspot	n/a	n/a	n/a	-	-
USB	Yes	Yes Mini-USB	Yes Micro-USB	Yes Mini-USB	Yes
Wi-Fi	Yes	Yes 802.11 b,g	Yes 4 (802.11 b,g,n)	-	-
Contacts
Picture ID	n/a	n/a	n/a	Yes	Yes
Ringer ID	n/a	n/a	n/a	Yes	Yes
Voice Dialing	n/a	n/a	n/a	Yes	Yes
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	-	Yes
Data & Network
Data Tethering	n/a	n/a	n/a	Yes	Yes
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	Yes
Touch Screen	Yes	Yes	Yes	-	-
Memory
Memory Card Slot	Yes	Yes	Yes	Yes	Yes
Messaging
Email Client	n/a	n/a	n/a	-	Yes
EMS / Picture Messaging	n/a	n/a	n/a	Yes	-
Instant Messaging	n/a	n/a	n/a	Yes *	-
MMS	n/a	n/a	n/a	Yes	Yes
Text Messaging Templates	n/a	n/a	n/a	Yes	Yes
Music
FM Radio	-	-	-	-	Yes
Headphone Jack (3.5mm)	Yes	Yes	Yes	-	-
Music Player	n/a	n/a	n/a	Yes	Yes
Photo & Video
Video Calling	n/a	n/a	n/a	-	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	Yes	Yes
Software
BREW	n/a	n/a	n/a	Yes *	-
Games	n/a	n/a	n/a	Yes	Yes
Java (J2ME)	n/a	n/a	n/a	Yes *	Yes
Voice
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Nokia Lumia 521 / 520	HTC Droid Eris	Huawei W1	Motorola KRZR K1m	Sony Ericsson K850
	X >	< X >	< X >	< X >	< X

NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Nokia Lumia 521 / 520	HTC Droid Eris	Huawei W1	Motorola KRZR K1m	Sony Ericsson K850