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Phone	Samsung Nexus S	AT&T Maestro 3	Motorola V551 / V330 / V547 / V555 / V557	Nokia Lumia 521 / 520	Alcatel Avalon V
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4" diag. 5 : 3	6.5" diag. 20 : 9	?	4" diag. 5 : 3	5.3" diag. 18 : 9
Display Resolution & Type	480 x 800 pixels (~233 ppi) AMOLED	720 x 1600 pixels (~270 ppi) LCD (TFT/TFD)	176 x 220 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	480 x 960 pixels (~201 ppi) LCD (TFT/TFD)
Display Refresh	60 Hz	60 Hz	?	?	60 Hz
Battery	1,500 mAh	3,900 mAh	820 mAh	1,430 mAh	2,460 mAh
Processor	1 GHz Samsung Hummingbird Cortex A8	2 GHz MediaTek Helio A22 (MT6761)	?	1 GHz Qualcomm Snapdragon S4 MSM8270	1.4 GHz Qualcomm Snapdragon 425 (MSM8917) (MSM8917)
RAM	?	3 GB	?	512 MB	2 GB
Storage	16 GB	32 GB	? raw hardware	8 GB	16 GB
Main Camera	5 megapixel	13 megapixel	Yes	5 megapixel	5 megapixel
Wide Camera	-	5 megapixel	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	WVGA / 480p	1080p HD	?	720p HD	720p HD
Front Camera	Yes	5 megapixel	-	-	2 megapixel
Weight	4.55 oz (129g)	6.24 oz (177g)	4.23 oz (120g)	4.39 oz (124g)	5.5 oz (156g)
Dimensions	4.88" x 2.48" x 0.43" (124 x 63 x 10.9 mm)	6.58" x 3.03" x 0.33" (167 x 77 x 8.4 mm)	3.5" x 1.93" x 0.97" (89 x 49 x 24.6 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	5.83" x 2.73" x 0.37" (148 x 69 x 9.4 mm)
Form Factor	Slab	Slab	Clamshell	Slab	Slab
Platform / OS	Android	Android	(proprietary)	Windows	Android
Network Bands	WCDMA: 1, 4, 8 GSM: 850, 900, 1800, 1900 *	4G LTE: 2, 4, 5, 12, 14, 30	GSM: 850, 900, 1800, 1900 *	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	4G LTE: 2, 4, 5, 13, 66 WCDMA: 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	HSPA 7.2	LTE (Cat 4)	EDGE	HSPA+ 21	LTE (Cat 4)
Features
Barometer	-	Yes	-	-	-
Fingerprint Reader	-	Yes stand-alone	-	-	-
Flashlight	-	Yes	-	-	Yes
GPS / Location	n/a	n/a	-	n/a	n/a
Accessibility
Hearing Aid Compatible	Yes M3 (mostly compatible)	Yes M4, T4 (very tele-coil compatible)	-	Yes M3, T4 (very tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	n/a	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	-	-	Yes	Yes	Yes
Alerts
Extra Display	-	-	Yes	-	-
Ringer Profiles	-	-	Yes	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Mobile Hotspot	n/a	n/a	-	n/a	n/a
NFC	Yes	-	-	-	-
USB	Yes Micro-USB	Yes USB Type C	Yes	Yes	Yes Micro-USB
Wi-Fi	Yes 4 (802.11 b,g,n)	Yes 5 (802.11 a,ac,b,g,n)	-	Yes	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	n/a	n/a	Yes	n/a	n/a
Ringer ID	n/a	n/a	Yes	n/a	n/a
Voice Dialing	n/a	n/a	Yes	n/a	n/a
Customization
Custom Graphics	n/a	n/a	Yes	n/a	n/a
Custom Ringtones	n/a	n/a	Yes	n/a	n/a
Real-Music Ringers	n/a	n/a	Yes	n/a	n/a
Data & Network
Data Tethering	n/a	n/a	Yes	n/a	n/a
WAP / Web Browser	n/a	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	n/a	n/a	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	Yes Capacitive	Yes Capacitive	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	Yes	-	Yes	Yes
Messaging
Email Client	n/a	n/a	Yes	n/a	n/a
EMS / Picture Messaging	n/a	n/a	Yes	n/a	n/a
Instant Messaging	n/a	n/a	Yes	n/a	n/a
MMS	n/a	n/a	Yes	n/a	n/a
Text Messaging Templates	n/a	n/a	Yes	n/a	n/a
Music
Headphone Jack (3.5mm)	Yes	Yes	-	Yes	Yes
Music Player	n/a	n/a	-	n/a	n/a
Productivity
Alarm	n/a	n/a	Yes	n/a	n/a
Calculator	n/a	n/a	Yes	n/a	n/a
Calendar	n/a	n/a	Yes	n/a	n/a
To-Do List	n/a	n/a	-	n/a	n/a
Voice Memo	n/a	n/a	Yes	n/a	n/a
Software
Games	n/a	n/a	Yes	n/a	n/a
Java (J2ME)	n/a	n/a	Yes	n/a	n/a
Voice
HD Voice	-	Yes	-	-	Yes
Headset Jack (2.5 mm)	n/a	n/a	Yes	n/a	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Samsung Nexus S	AT&T Maestro 3	Motorola V551 / V330 / V547 / V555 / V557	Nokia Lumia 521 / 520	Alcatel Avalon V
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung Nexus S	AT&T Maestro 3	Motorola V551 / V330 / V547 / V555 / V557	Nokia Lumia 521 / 520	Alcatel Avalon V