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Phone	Samsung SGH-X640	Motorola T191	Pantech Duo C810	Nokia Lumia 810	Samsung Galaxy S II Skyrocket
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	?	2.2" diag. 4 : 3	4.3" diag. 5 : 3	4.5" diag. 5 : 3
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	98 x 64 pixels	240 x 320 pixels (~182 ppi) LCD (TFT/TFD)	480 x 800 pixels (~217 ppi) AMOLED	480 x 800 pixels (~207 ppi) AMOLED
Display Refresh	?	?	?	?	60 Hz
Battery	800 mAh	?	1,320 mAh	1,800 mAh	1,850 mAh
Processor	?	?	ARM 920t PXA27x	1.5 GHz Qualcomm Snapdragon	1.5 GHz Qualcomm Snapdragon S3 APQ8060
RAM	?	?	?	1 GB	1 GB
Storage	? raw hardware	? raw hardware	? raw hardware	8 GB	16 GB
Main Camera	Yes	-	1 megapixel	8 megapixel	8 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	-	QVGA (320 x 240)	1080p HD	1080p HD
Front Camera	-	-	-	1 megapixel	2 megapixel
Weight	3 oz (85g)	3.49 oz (99g)	3.88 oz (110g)	5.11 oz (145g)	4.71 oz (133g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.17" x 1.57" x 0.59" (106 x 40 x 15 mm)	4.01" x 1.97" x 0.78" (102 x 50 x 19.8 mm)	5" x 2.69" x 0.44" (127 x 68 x 11.2 mm)	5.12" x 2.72" x 0.35" (130 x 69 x 9 mm)
Form Factor	Clamshell	Slab	Slide	Slab	Slab
Platform / OS	(proprietary)	(proprietary)	Windows Mobile Standard	Windows	Android
Network Bands	GSM: 900, 1800, 1900	GSM: 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	4G LTE: 4, 17 WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	GPRS	-	HSDPA 1.8	HSPA+ 42	LTE (Cat 3)
Features
GPS / Location	-	-	n/a	n/a	n/a
Accessibility
Adjustable Text Size	-	-	n/a	n/a	n/a
Hearing Aid Compatible	-	-	-	Yes M3, T4 (very tele-coil compatible)	Yes M3 (mostly compatible)
Multiple Languages	Yes	Yes	n/a	n/a	n/a
TTY/TDD (Digital)	-	-	-	Yes	Yes
Alerts
Ringer Profiles	-	Yes	Yes	-	-
Connectivity
Bluetooth	-	-	Yes	Yes	Yes
Mobile Hotspot	-	-	n/a	n/a	n/a
NFC	-	-	-	Yes	Yes
USB	-	-	Yes	Yes Micro-USB	Yes Micro-USB
Wi-Fi	-	-	-	Yes 4 (802.11 a,b,g,n)	Yes 4 (802.11 a,b,g,n)
Contacts
Picture ID	Yes	-	n/a	n/a	n/a
Ringer ID	Yes	-	n/a	n/a	n/a
Voice Dialing	-	Yes	n/a	n/a	n/a
Customization
Custom Graphics	Yes	Yes	n/a	n/a	n/a
Custom Ringtones	Yes	Yes	n/a	n/a	n/a
Real-Music Ringers	-	-	n/a	n/a	n/a
Data & Network
Data Tethering	-	Yes	n/a	n/a	n/a
WAP / Web Browser	Yes	Yes	n/a	n/a	n/a
Input
Predictive Text Entry	Yes	Yes	n/a	n/a	n/a
Side Keys	Yes	-	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	Yes	-	-
Touch Screen	-	-	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	-	Yes	Yes	Yes
Messaging
Email Client	-	-	n/a	n/a	n/a
EMS / Picture Messaging	Yes	-	n/a	n/a	n/a
Instant Messaging	-	-	n/a	n/a	n/a
MMS	Yes	-	n/a	n/a	n/a
Text Messaging Templates	Yes	Yes	n/a	n/a	n/a
Music
Headphone Jack (3.5mm)	-	-	-	Yes	Yes
Music Player	-	-	n/a	n/a	n/a
Photo & Video
DLNA	-	-	-	-	Yes
TV Output	-	-	-	-	Yes
Power
Wireless Charging	-	-	-	Yes	-
Productivity
Alarm	Yes	Yes	n/a	n/a	n/a
Calculator	Yes	Yes	n/a	n/a	n/a
Calendar	Yes	Yes	n/a	n/a	n/a
To-Do List	Yes	-	n/a	n/a	n/a
Voice Memo	Yes	Yes	n/a	n/a	n/a
Software
Games	Yes	Yes	n/a	n/a	n/a
Java (J2ME)	Yes	-	n/a	n/a	n/a
Voice
Headset Jack (2.5 mm)	Yes	Yes	n/a	n/a	n/a
Speaker Phone	Yes	-	Yes	Yes	Yes
	Samsung SGH-X640	Motorola T191	Pantech Duo C810	Nokia Lumia 810	Samsung Galaxy S II Skyrocket
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	Motorola T191	Pantech Duo C810	Nokia Lumia 810	Samsung Galaxy S II Skyrocket