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Phone	Nokia Lumia 521 / 520	Nokia E50	BlackBerry Curve 8320
Current U.S. Carriers	(none)	(none)	(none)
Global Availability	Released	Released	Released
Display Size	4" diag. 5 : 3	?	?
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	240 x 320 pixels LCD (TFT/TFD)	320 x 240 pixels LCD (TFT/TFD)
Display Refresh	?	?	?
Battery	1,430 mAh	970 mAh	1,100 mAh
Processor	1 GHz Qualcomm Snapdragon S4 MSM8270	?	?
RAM	512 MB	?	?
Storage	8 GB	? raw hardware	? raw hardware
Main Camera	5 megapixel	1 megapixel	2 megapixel
Wide Camera	-	-	-
Tele Camera	-	-	-
Video Capture	720p HD	QCIF (176 x 144)	-
Front Camera	-	-	-
Weight	4.39 oz (124g)	3.67 oz (104g)	3.92 oz (111g)
Dimensions	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	4.45" x 1.71" x 0.61" (113 x 43 x 15.5 mm)	4.21" x 2.36" x 0.61" (107 x 60 x 15.5 mm)
Platform / OS	Windows	S60 (Symbian)	BlackBerry OS
Network Bands	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	GSM: 850, 900, 1800, 1900	GSM: 850, 900, 1800, 1900
Data Technology	HSPA+ 21	EDGE	EDGE
Features
Accessibility
Hearing Aid Compatible	Yes	-	Yes
TTY/TDD (Digital)	Yes	-	Yes
Alerts
Ringer Profiles	-	Yes	Yes
Connectivity
Bluetooth	Yes	Yes Classic Audio	Yes Classic Audio
Infrared (IR)	-	Yes	-
USB	Yes	Yes	Yes
Wi-Fi	Yes	-	Yes 802.11 b,g
Input
Side Keys	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	Yes
Touch Screen	Yes	-	-
Memory
Memory Card Slot	Yes	Yes	Yes
Music
Headphone Jack (3.5mm)	Yes	-	Yes
Voice
Push-To-Talk	-	Yes	-
Speaker Phone	Yes	Yes	Yes
	Nokia Lumia 521 / 520	Nokia E50	BlackBerry Curve 8320
	X >	< X >	< X

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


Phone	Nokia Lumia 521 / 520	Nokia E50	BlackBerry Curve 8320