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Phone	Motorola ROKR E2	Sony Ericsson Z550a	Nokia Lumia 521 / 520	LG Invision	HTC One S
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	1.9" diag. 4 : 3	4" diag. 5 : 3	2.2" diag. 4 : 3	4.3" diag. 16 : 9
Display Resolution & Type	240 x 320 pixels LCD (TFT/TFD)	176 x 220 pixels (~148 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	320 x 240 pixels (~182 ppi) LCD (TFT/TFD)	540 x 960 pixels (~256 ppi) AMOLED
Display Refresh	?	?	?	?	60 Hz
Battery	?	?	1,430 mAh	900 mAh	1,650 mAh
Processor	?	?	1 GHz Qualcomm Snapdragon S4 MSM8270	?	1.5 GHz Qualcomm Snapdragon S4 Plus MSM8260A
RAM	?	?	512 MB	?	1 GB
Storage	? raw hardware	? raw hardware	8 GB	? raw hardware	16 GB
Main Camera	1 megapixel	1 megapixel	5 megapixel	1 megapixel	8 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	?	720p HD	QVGA (320 x 240)	1080p HD
Front Camera	-	-	-	-	Yes
Weight	3.77 oz (107g)	3.26 oz (92g)	4.39 oz (124g)	2.85 oz (81g)	4.2 oz (119g)
Dimensions	4.17" x 1.95" x 0.71" (106 x 50 x 18 mm)	3.43" x 1.77" x 0.79" (87 x 45 x 20.1 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	4.05" x 2.08" x 0.47" (103 x 53 x 11.9 mm)	5.15" x 2.56" x 0.31" (131 x 65 x 7.9 mm)
Form Factor	Slab	Clamshell	Slab	Slab	Slab
Platform / OS	(proprietary)	(proprietary)	Windows	(proprietary)	Android
Network Bands	GSM: 900, 1800, 1900	GSM: 850, 900, 1800, 1900 *	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900 *
Data Technology	EDGE	GPRS	HSPA+ 21	HSDPA 3.6	HSPA+ 42
Features
Flashlight	-	-	-	-	Yes
GPS / Location	-	-	n/a	-	n/a
Accessibility
Hearing Aid Compatible	-	-	Yes M3, T4 (very tele-coil compatible)	-	Yes M4, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	Yes	n/a	Yes	n/a
TTY/TDD (Digital)	-	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	Yes	-	-	-
Ringer Profiles	Yes	Yes	-	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Mobile Hotspot	-	-	n/a	-	n/a
USB	Yes	Yes	Yes	Yes	Yes Micro-USB
Wi-Fi	-	-	Yes	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	Yes	Yes	n/a	Yes	n/a
Ringer ID	Yes	Yes	n/a	Yes	n/a
Voice Dialing	Yes	Yes	n/a	Yes	n/a
Customization
Custom Graphics	Yes	Yes	n/a	Yes	n/a
Custom Ringtones	Yes	Yes	n/a	Yes	n/a
Real-Music Ringers	-	Yes	n/a	Yes	n/a
Data & Network
Data Tethering	Yes	Yes	n/a	-	n/a
WAP / Web Browser	Yes	Yes	n/a	Yes	n/a
Input
Predictive Text Entry	Yes	Yes	n/a	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	-	-	Yes Capacitive	-	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	Yes	Yes	-
Messaging
Email Client	Yes	Yes	n/a	Yes	n/a
Instant Messaging	-	-	n/a	Yes	n/a
MMS	Yes	Yes	n/a	Yes	n/a
Text Messaging Templates	Yes	Yes	n/a	Yes	n/a
Music
FM Radio	Yes	Yes	-	-	Yes
Headphone Jack (3.5mm)	Yes	-	Yes	-	Yes
Music Player	Yes	Yes	n/a	Yes	n/a
Photo & Video
DLNA	-	-	-	-	Yes
TV Output	-	-	-	-	Yes
Productivity
Alarm	Yes	Yes	n/a	Yes	n/a
Calculator	Yes	Yes	n/a	Yes	n/a
Calendar	Yes	Yes	n/a	Yes	n/a
To-Do List	Yes	Yes	n/a	-	n/a
Voice Memo	Yes	Yes	n/a	Yes	n/a
Software
Games	Yes	Yes	n/a	Yes	n/a
Java (J2ME)	Yes	Yes	n/a	Yes	n/a
Voice
HD Voice	-	-	-	-	Yes
Push-To-Talk	-	Yes *	-	-	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Motorola ROKR E2	Sony Ericsson Z550a	Nokia Lumia 521 / 520	LG Invision	HTC One S
	X >	< X >	< X >	< X >	< X

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


Phone	Motorola ROKR E2	Sony Ericsson Z550a	Nokia Lumia 521 / 520	LG Invision	HTC One S