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Phone	Samsung SCH-i830 / IP-830w	AT&T Maestro 3	Nokia Lumia 521 / 520	Motorola Rival A455	Samsung Transform Ultra
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	6.5" diag. 20 : 9	4" diag. 5 : 3	2.2" diag. 4 : 3	3.5" diag. 5 : 3
Display Resolution & Type	240 x 320 pixels LCD (TFT/TFD)	720 x 1600 pixels (~270 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	176 x 220 pixels (~131 ppi) LCD (TFT/TFD)	320 x 480 pixels (~165 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	60 Hz
Battery	?	3,900 mAh	1,430 mAh	940 mAh	1,500 mAh
Processor	520 MHz Intel Bulverde	2 GHz MediaTek Helio A22 (MT6761)	1 GHz Qualcomm Snapdragon S4 MSM8270	?	1 GHz Qualcomm Snapdragon S2 MSM8655
RAM	?	3 GB	512 MB	?	?
Storage	? raw hardware	32 GB	8 GB	? raw hardware	? raw hardware
Main Camera	-	13 megapixel	5 megapixel	2 megapixel	3 megapixel
Wide Camera	-	5 megapixel	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	1080p HD	720p HD	QVGA (320 x 240)	VGA (640 x 480)
Front Camera	-	5 megapixel	-	-	Yes
Weight	6.44 oz (183g)	6.24 oz (177g)	4.39 oz (124g)	4.48 oz (127g)	4.9 oz (139g)
Dimensions	4.49" x 2.28" x 0.97" (114 x 58 x 24.6 mm)	6.58" x 3.03" x 0.33" (167 x 77 x 8.4 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	3.82" x 1.96" x 0.73" (97 x 50 x 18.5 mm)	4.5" x 2.4" x 0.55" (114 x 61 x 14 mm)
Form Factor	Slide	Slab	Slab	Slide	Slide
Platform / OS	Windows Mobile Professional	Android	Windows	(proprietary)	Android
Network Bands	CDMA: 850, 1900 GSM: 900, 1800	4G LTE: 2, 4, 5, 12, 14, 30	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900	CDMA: 800, 850, 1900
Data Technology	EVDO r0	LTE (Cat 4)	HSPA+ 21	EVDO r0	EVDO rA
Features
Barometer	-	Yes	-	-	-
Fingerprint Reader	-	Yes stand-alone	-	-	-
Flashlight	-	Yes	-	-	-
GPS / Location	n/a	n/a	n/a	Yes	n/a
Accessibility
Hearing Aid Compatible	-	Yes M4, T4 (very tele-coil compatible)	Yes M3, T4 (very tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)	Yes M4 (very compatible)
Multiple Languages	n/a	n/a	n/a	Yes	n/a
TTY/TDD (Digital)	Yes	-	Yes	Yes	Yes
Alerts
Ringer Profiles	Yes	-	-	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Infrared (IR)	Yes	-	-	-	-
Mobile Hotspot	n/a	n/a	n/a	-	n/a
USB	Yes	Yes USB Type C	Yes	Yes Micro-USB	Yes
Wi-Fi	-	Yes 5 (802.11 a,ac,b,g,n)	Yes	-	Yes 4 (802.11 a,b,g,n)
Contacts
Picture ID	n/a	n/a	n/a	Yes	n/a
Ringer ID	n/a	n/a	n/a	Yes	n/a
Voice Dialing	n/a	n/a	n/a	Yes	n/a
Customization
Custom Graphics	n/a	n/a	n/a	Yes	n/a
Custom Ringtones	n/a	n/a	n/a	Yes	n/a
Real-Music Ringers	n/a	n/a	n/a	Yes	n/a
Data & Network
Data Tethering	n/a	n/a	n/a	Yes	n/a
WAP / Web Browser	n/a	n/a	n/a	Yes	n/a
Input
Predictive Text Entry	n/a	n/a	n/a	-	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	Yes	-	-	Yes	Yes
Touch Screen	Yes	Yes Capacitive	Yes Capacitive	Yes	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	Yes	Yes	Yes
Messaging
Email Client	n/a	n/a	n/a	Yes	n/a
EMS / Picture Messaging	n/a	n/a	n/a	Yes	n/a
Instant Messaging	n/a	n/a	n/a	Yes	n/a
MMS	n/a	n/a	n/a	Yes	n/a
Text Messaging Templates	n/a	n/a	n/a	Yes	n/a
Music
Headphone Jack (3.5mm)	-	Yes	Yes	Yes	Yes
Music Player	n/a	n/a	n/a	Yes	n/a
Stereo Speakers	Yes	-	-	-	-
Productivity
Alarm	n/a	n/a	n/a	Yes	n/a
Calculator	n/a	n/a	n/a	Yes	n/a
Calendar	n/a	n/a	n/a	Yes	n/a
To-Do List	n/a	n/a	n/a	-	n/a
Voice Memo	n/a	n/a	n/a	Yes	n/a
Software
BREW	n/a	n/a	n/a	Yes	n/a
Games	n/a	n/a	n/a	Yes	n/a
Voice
HD Voice	-	Yes	-	-	-
Headset Jack (2.5 mm)	n/a	n/a	n/a	-	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Samsung SCH-i830 / IP-830w	AT&T Maestro 3	Nokia Lumia 521 / 520	Motorola Rival A455	Samsung Transform Ultra
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SCH-i830 / IP-830w	AT&T Maestro 3	Nokia Lumia 521 / 520	Motorola Rival A455	Samsung Transform Ultra