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Phone	Samsung SGH-X640	Nokia Lumia 920	Nokia Lumia 900	ZTE Blade Vantage
Current U.S. Carriers	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released
Display Size	?	4.5" diag. 5 : 3	4.3" diag. 5 : 3	5" diag. 16 : 9
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	768 x 1280 pixels (~332 ppi) LCD (TFT/TFD)	480 x 800 pixels (~217 ppi) AMOLED	480 x 854 pixels (~196 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	60 Hz
Battery	800 mAh	2,000 mAh	1,830 mAh	2,500 mAh
Processor	?	1.5 GHz Qualcomm Snapdragon S4	1.4 GHz Qualcomm S2 APQ8055	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)
RAM	?	1 GB	512 MB	2 GB
Storage	? raw hardware	32 GB	16 GB	16 GB
Main Camera	Yes	8 megapixel	8 megapixel	8 megapixel
Wide Camera	-	-	-	-
Tele Camera	-	-	-	-
Video Capture	-	1080p HD	720p HD	720p HD
Front Camera	-	1 megapixel	1 megapixel	2 megapixel
Weight	3 oz (85g)	6.53 oz (185g)	5.6 oz (159g)	5.29 oz (150g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	5.12" x 2.79" x 0.42" (130 x 71 x 10.7 mm)	5.03" x 2.7" x 0.45" (128 x 69 x 11.4 mm)	5.73" x 2.85" x 0.36" (146 x 72 x 9.2 mm)
Form Factor	Clamshell	Slab	Slab	Slab
Platform / OS	(proprietary)	Windows	Windows	Android
Network Bands	GSM: 900, 1800, 1900	4G LTE: 2, 4, 5, 17 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900	4G LTE: 4, 17 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900 *	4G LTE: 2, 4, 5, 13
Data Technology	GPRS	LTE (Cat 3)	LTE (Cat 3)	LTE (Cat 4)
Features
Flashlight	-	-	-	Yes
GPS / Location	-	n/a	n/a	n/a
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a
Hearing Aid Compatible	-	Yes M3, T3 (mostly tele-coil compatible)	Yes M3, T4 (very tele-coil compatible)	Yes M4, T4 (very tele-coil compatible)
Multiple Languages	Yes	n/a	n/a	n/a
TTY/TDD (Digital)	-	Yes	Yes	Yes
Connectivity
Bluetooth	-	Yes	Yes	Yes
Mobile Hotspot	-	n/a	n/a	n/a
NFC	-	Yes	-	-
USB	-	Yes Micro-USB	Yes Micro-USB	Yes Micro-USB
Wi-Fi	-	Yes 4 (802.11 a,b,g,n)	Yes	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	Yes	n/a	n/a	n/a
Ringer ID	Yes	n/a	n/a	n/a
Voice Dialing	-	n/a	n/a	n/a
Customization
Custom Graphics	Yes	n/a	n/a	n/a
Custom Ringtones	Yes	n/a	n/a	n/a
Real-Music Ringers	-	n/a	n/a	n/a
Data & Network
WAP / Web Browser	Yes	n/a	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes
Touch Screen	-	Yes Capacitive	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	-	-	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	n/a	n/a	n/a
Music
FM Radio	-	-	Yes	-
Headphone Jack (3.5mm)	-	Yes	Yes	Yes
Music Player	-	n/a	n/a	n/a
Power
Wireless Charging	-	Yes	-	-
Productivity
Alarm	Yes	n/a	n/a	n/a
Calculator	Yes	n/a	n/a	n/a
Calendar	Yes	n/a	n/a	n/a
To-Do List	Yes	n/a	n/a	n/a
Voice Memo	Yes	n/a	n/a	n/a
Software
Games	Yes	n/a	n/a	n/a
Java (J2ME)	Yes	n/a	n/a	n/a
Voice
HD Voice	-	-	-	Yes
Headset Jack (2.5 mm)	Yes	n/a	n/a	n/a
Speaker Phone	Yes	Yes	Yes	Yes
	Samsung SGH-X640	Nokia Lumia 920	Nokia Lumia 900	ZTE Blade Vantage
	X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	Nokia Lumia 920	Nokia Lumia 900	ZTE Blade Vantage