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Phone	BlackBerry 7750	Nokia Lumia 521 / 520	HTC Droid Eris
Current U.S. Carriers	(none)	(none)	(none)
Global Availability	Released	Released	Released
Display Size	?	4" diag. 5 : 3	3.2" diag. 5 : 3
Display Resolution & Type	240 x 240 pixels LCD (Color)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	320 x 480 pixels (~180 ppi) LCD (TFT/TFD)
Display Refresh	?	?	60 Hz
Battery	?	1,430 mAh	1,300 mAh
Processor	?	1 GHz Qualcomm Snapdragon S4 MSM8270	528 MHz MSM7600
RAM	?	512 MB	?
Storage	? raw hardware	8 GB	? raw hardware
Main Camera	-	5 megapixel	5 megapixel
Wide Camera	-	-	-
Tele Camera	-	-	-
Video Capture	-	720p HD	CIF (352 x 288)
Front Camera	-	-	-
Weight	5.01 oz (142g)	4.39 oz (124g)	4.43 oz (126g)
Dimensions	4.76" x 3.03" x 0.71" (121 x 77 x 18 mm)	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	4.45" x 2.19" x 0.52" (113 x 55 x 13.2 mm)
Platform / OS	BlackBerry OS	Windows	Android
Network Bands	CDMA: 850, 1900	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900
Data Technology	1xRTT	HSPA+ 21	EVDO rA
Features
Accessibility
Hearing Aid Compatible	-	Yes M3, T4 (very tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)
TTY/TDD (Digital)	Yes	Yes	Yes
Alerts
Ringer Profiles	Yes	-	-
Connectivity
Bluetooth	-	Yes	Yes
USB	Yes	Yes	Yes Mini-USB
Wi-Fi	-	Yes	Yes 802.11 b,g
Input
Side Keys	Yes	Yes	Yes
Text Keyboard, Hardware	Yes	-	-
Touch Screen	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	Yes	Yes
Music
Headphone Jack (3.5mm)	-	Yes	Yes
Voice
Speaker Phone	-	Yes	Yes
	BlackBerry 7750	Nokia Lumia 521 / 520	HTC Droid Eris
	X >	< X >	< X

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


Phone	BlackBerry 7750	Nokia Lumia 521 / 520	HTC Droid Eris