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Phone	Nokia Lumia 521 / 520	Sharp Sidekick LX 2009	ZTE Savvy	BLU Life One X3
Current U.S. Carriers	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released
Display Size	4" diag. 5 : 3	3.2" diag. 16 : 9	4" diag. 5 : 3	5.5" diag. 16 : 9
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	854 x 480 pixels (~306 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	1080 x 1920 pixels (~401 ppi) LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	60 Hz
Battery	1,430 mAh	1,250 mAh	1,650 mAh	5,000 mAh
Processor	1 GHz Qualcomm Snapdragon S4 MSM8270	?	1 GHz Qualcomm MSM8625	1.3 GHz MediaTek 6753
RAM	512 MB	?	768 MB	3 GB
Storage	8 GB	? raw hardware	4 GB	32 GB
Main Camera	5 megapixel	3 megapixel	5 megapixel	13 megapixel
Wide Camera	-	-	-	-
Tele Camera	-	-	-	-
Video Capture	720p HD	QVGA (320 x 240)	WVGA / 480p	1080p HD
Front Camera	-	-	-	13 megapixel
Weight	4.39 oz (124g)	5.78 oz (164g)	4.43 oz (126g)	6.42 oz (182g)
Dimensions	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	5.12" x 2.36" x 0.63" (130 x 60 x 16 mm)	4.96" x 2.55" x 0.42" (126 x 65 x 10.7 mm)	6.02" x 2.97" x 0.35" (153 x 75 x 8.9 mm)
Form Factor	Slab	Swivel	Slab	Slab
Platform / OS	Windows	(proprietary)	Android	Android
Network Bands	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900	4G LTE: 1, 2, 3, 4, 7, 12, 17, 28 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900
Data Technology	HSPA+ 21	HSPA 7.2	EVDO rA	LTE (Cat 4)
Features
Fingerprint Reader	-	-	-	Yes stand-alone
Flashlight	-	-	Yes	Yes
GPS / Location	n/a	Yes	n/a	n/a
Accessibility
Adjustable Text Size	n/a	Yes	n/a	n/a
Hearing Aid Compatible	Yes M3, T4 (very tele-coil compatible)	Yes M3 (mostly compatible)	Yes M4, T4 (very tele-coil compatible)	-
Multiple Languages	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	-	Yes	Yes
Alerts
Ringer Profiles	-	Yes	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes
Mobile Hotspot	n/a	-	n/a	n/a
USB	Yes	Yes	Yes Micro-USB	Yes Micro-USB
Wi-Fi	Yes	-	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	n/a	Yes	n/a	n/a
Ringer ID	n/a	Yes	n/a	n/a
Voice Dialing	n/a	-	n/a	n/a
Customization
Custom Graphics	n/a	Yes	n/a	n/a
Custom Ringtones	n/a	Yes	n/a	n/a
Real-Music Ringers	n/a	Yes	n/a	n/a
Data & Network
Data Tethering	n/a	-	n/a	n/a
Dual-SIM	-	-	-	Yes
WAP / Web Browser	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	n/a	-	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	Yes	-	-
Touch Screen	Yes Capacitive	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	Yes	Yes
Messaging
Email Client	n/a	Yes	n/a	n/a
Instant Messaging	n/a	Yes	n/a	n/a
MMS	n/a	Yes	n/a	n/a
Text Messaging Templates	n/a	Yes	n/a	n/a
Music
FM Radio	-	-	-	Yes
Headphone Jack (3.5mm)	Yes	Yes	Yes	Yes
Music Player	n/a	Yes	n/a	n/a
Photo & Video
DLNA	-	-	Yes	-
Power
Fast Charging	-	-	-	Yes
Productivity
Alarm	n/a	Yes	n/a	n/a
Calculator	n/a	-	n/a	n/a
Calendar	n/a	Yes	n/a	n/a
To-Do List	n/a	Yes	n/a	n/a
Voice Memo	n/a	-	n/a	n/a
Software
Games	n/a	Yes	n/a	n/a
Java (J2ME)	n/a	Yes	n/a	n/a
Voice
Speaker Phone	Yes	Yes	Yes	Yes
	Nokia Lumia 521 / 520	Sharp Sidekick LX 2009	ZTE Savvy	BLU Life One X3
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Nokia Lumia 521 / 520	Sharp Sidekick LX 2009	ZTE Savvy	BLU Life One X3