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Phone	Samsung SGH-X820	Palm Treo Pro (CDMA)	Motorola Defy (2010)	ZTE Blade Vantage	Nokia Lumia 521 / 520
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	?	3.6" diag. 16 : 9	5" diag. 16 : 9	4" diag. 5 : 3
Display Resolution & Type	220 x 176 pixels LCD (TFT/TFD)	320 x 320 pixels LCD (TFT/TFD)	480 x 854 pixels (~272 ppi) LCD (TFT/TFD)	480 x 854 pixels (~196 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	60 Hz	?
Battery	650 mAh	1,500 mAh	1,540 mAh	2,500 mAh	1,430 mAh
Processor	?	528 MHz Qualcomm MSM7501a	800 MHz TI OMAP3610	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)	1 GHz Qualcomm Snapdragon S4 MSM8270
RAM	?	?	?	2 GB	512 MB
Storage	? raw hardware	? raw hardware	? raw hardware	16 GB	8 GB
Main Camera	2 megapixel	2 megapixel	5 megapixel	8 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	?	?	720p HD	720p HD
Front Camera	-	-	-	2 megapixel	-
Weight	2.33 oz (66g)	4.69 oz (133g)	4.16 oz (118g)	5.29 oz (150g)	4.39 oz (124g)
Dimensions	4.45" x 1.97" x 0.27" (113 x 50 x 6.9 mm)	4.49" x 2.36" x 0.53" (114 x 60 x 13.5 mm)	4.21" x 2.32" x 0.53" (107 x 59 x 13.4 mm)	5.73" x 2.85" x 0.36" (146 x 72 x 9.2 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)
Form Factor	Slab	Slab	Slab	Slab	Slab
Platform / OS	(proprietary)	Windows Mobile Professional	Android	Android	Windows
Network Bands	GSM: 900, 1800, 1900	CDMA: 850, 1900	WCDMA: 1, 4, 5 GSM: 850, 900, 1800, 1900	4G LTE: 2, 4, 5, 13	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *
Data Technology	EDGE	EVDO rA	HSPA 7.2	LTE (Cat 4)	HSPA+ 21
Features
Flashlight	-	-	-	Yes	-
GPS / Location	-	n/a	n/a	n/a	n/a
Ruggedized	-	-	Yes	-	-
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a	n/a
Hearing Aid Compatible	-	Yes	-	Yes	Yes
Multiple Languages	Yes	n/a	n/a	n/a	n/a
TTY/TDD (Digital)	-	Yes	Yes	Yes	Yes
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Infrared (IR)	-	Yes	-	-	-
Mobile Hotspot	-	n/a	n/a	n/a	n/a
USB	Yes	Yes Micro-USB	Yes Micro-USB	Yes Micro-USB	Yes
Wi-Fi	-	Yes 802.11 b,g	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 b,g,n)	Yes
Contacts
Picture ID	Yes	n/a	n/a	n/a	n/a
Ringer ID	Yes	n/a	n/a	n/a	n/a
Voice Dialing	-	n/a	n/a	n/a	n/a
Customization
Custom Graphics	Yes	n/a	n/a	n/a	n/a
Custom Ringtones	Yes	n/a	n/a	n/a	n/a
Real-Music Ringers	Yes	n/a	n/a	n/a	n/a
Data & Network
Data Tethering	-	n/a	n/a	n/a	n/a
External Antenna Jack	Yes	n/a	n/a	n/a	n/a
WAP / Web Browser	Yes	n/a	n/a	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	n/a	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Stylus	-	Yes	-	-	-
Text Keyboard, Hardware	-	Yes	-	-	-
Touch Screen	-	Yes	Yes	Yes	Yes
Memory
Memory Card Slot	-	Yes	Yes	Yes	Yes
Messaging
Email Client	Yes	n/a	n/a	n/a	n/a
EMS / Picture Messaging	Yes	n/a	n/a	n/a	n/a
Instant Messaging	-	n/a	n/a	n/a	n/a
MMS	Yes	n/a	n/a	n/a	n/a
Text Messaging Templates	Yes	n/a	n/a	n/a	n/a
Music
FM Radio	-	-	Yes	-	-
Headphone Jack (3.5mm)	-	Yes	Yes	Yes	Yes
Music Player	-	n/a	n/a	n/a	n/a
Photo & Video
DLNA	-	-	Yes	-	-
TV Output	Yes	-	-	-	-
Productivity
Alarm	Yes	n/a	n/a	n/a	n/a
Calculator	Yes	n/a	n/a	n/a	n/a
Calendar	Yes	n/a	n/a	n/a	n/a
To-Do List	Yes	n/a	n/a	n/a	n/a
Voice Memo	Yes	n/a	n/a	n/a	n/a
Software
Games	Yes	n/a	n/a	n/a	n/a
Java (J2ME)	Yes	n/a	n/a	n/a	n/a
Voice
HD Voice	-	-	-	Yes	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung SGH-X820	Palm Treo Pro (CDMA)	Motorola Defy (2010)	ZTE Blade Vantage	Nokia Lumia 521 / 520
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X820	Palm Treo Pro (CDMA)	Motorola Defy (2010)	ZTE Blade Vantage	Nokia Lumia 521 / 520