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Phone	Samsung SGH-X640	Samsung SGH-X820	Nokia Lumia 521 / 520	Sony Ericsson Z600	HTC EVO Shift 4G
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	?	4" diag. 5 : 3	?	3.6" diag. 5 : 3
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	220 x 176 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	480 x 800 pixels (~259 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	?	60 Hz
Battery	800 mAh	650 mAh	1,430 mAh	?	1,500 mAh
Processor	?	?	1 GHz Qualcomm Snapdragon S4 MSM8270	?	800 MHz Qualcomm S2 MSM7630
RAM	?	?	512 MB	?	?
Storage	? raw hardware	? raw hardware	8 GB	? raw hardware	? raw hardware
Main Camera	Yes	2 megapixel	5 megapixel	Yes	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	?	720p HD	-	720p HD
Front Camera	-	-	-	-	-
Weight	3 oz (85g)	2.33 oz (66g)	4.39 oz (124g)	3.88 oz (110g)	5.87 oz (166g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.45" x 1.97" x 0.27" (113 x 50 x 6.9 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	3.54" x 1.89" x 1.1" (90 x 48 x 27.9 mm)	4.6" x 2.32" x 0.61" (117 x 59 x 15.5 mm)
Form Factor	Clamshell	Slab	Slab	Clamshell	Slide
Platform / OS	(proprietary)	(proprietary)	Windows	(proprietary)	Android
Network Bands	GSM: 900, 1800, 1900	GSM: 900, 1800, 1900	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	GSM: 900, 1800, 1900	4G WiMAX: 41 CDMA: 850, 1900
Data Technology	GPRS	EDGE	HSPA+ 21	GPRS	WiMAX
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
Alerts
Extra Display	-	-	-	Yes	-
Connectivity
Bluetooth	-	Yes	Yes	Yes	Yes
Infrared (IR)	-	-	-	Yes	-
Mobile Hotspot	-	-	n/a	-	n/a
USB	-	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	-	-	n/a	Yes	n/a
Customization
Changeable Body Plates	-	-	-	Yes	-
Custom Graphics	Yes	Yes	n/a	Yes	n/a
Custom Ringtones	Yes	Yes	n/a	Yes	n/a
Real-Music Ringers	-	Yes	n/a	-	n/a
Data & Network
Data Tethering	-	-	n/a	Yes	n/a
External Antenna Jack	-	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
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	-	-	Yes Capacitive	-	Yes Capacitive
Memory
Memory Card Slot	-	-	Yes	-	Yes
Messaging
Email Client	-	Yes	n/a	Yes	n/a
EMS / Picture Messaging	Yes	Yes	n/a	Yes	n/a
Instant Messaging	-	-	n/a	-	n/a
MMS	Yes	Yes	n/a	Yes	n/a
Text Messaging Templates	Yes	Yes	n/a	Yes	n/a
Music
FM Radio	-	-	-	-	Yes
Headphone Jack (3.5mm)	-	-	Yes	-	Yes
Music Player	-	-	n/a	-	n/a
Photo & Video
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	Yes	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
Headset Jack (2.5 mm)	Yes	-	n/a	-	n/a
Speaker Phone	Yes	Yes	Yes	-	Yes
	Samsung SGH-X640	Samsung SGH-X820	Nokia Lumia 521 / 520	Sony Ericsson Z600	HTC EVO Shift 4G
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	Samsung SGH-X820	Nokia Lumia 521 / 520	Sony Ericsson Z600	HTC EVO Shift 4G