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Phone	Nokia Lumia 521 / 520	Audiovox CDM-8400 / CDM-8410	Samsung SGH-X820	ZTE Blade Max 3 / Max Blue	BlackBerry Curve 9350
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4" diag. 5 : 3	?	?	6" diag. 16 : 9	2.4" diag. 4 : 3
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	128 x 128 pixels LCD (STN)	220 x 176 pixels LCD (TFT/TFD)	1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD)	480 x 360 pixels (~246 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	60 Hz	?
Battery	1,430 mAh	?	650 mAh	4,000 mAh	1,040 mAh
Processor	1 GHz Qualcomm Snapdragon S4 MSM8270	?	?	2 GHz Qualcomm Snapdragon 625 (MSM8953)	800 MHz Marvell
RAM	512 MB	?	?	2 GB	?
Storage	8 GB	? raw hardware	? raw hardware	16 GB	? raw hardware
Main Camera	5 megapixel	-	2 megapixel	13 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	-	?	4K UHD	VGA (640 x 480)
Front Camera	-	-	-	5 megapixel	-
Weight	4.39 oz (124g)	3.52 oz (100g)	2.33 oz (66g)	6.34 oz (180g)	3.49 oz (99g)
Dimensions	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	4.3" x 1.8" x 0.7" (109 x 46 x 17.8 mm)	4.45" x 1.97" x 0.27" (113 x 50 x 6.9 mm)	6.49" x 3.3" x 0.35" (165 x 84 x 8.9 mm)	4.29" x 2.36" x 0.43" (109 x 60 x 10.9 mm)
Form Factor	Slab	Slab	Slab	Slab	Slab
Platform / OS	Windows	(proprietary)	(proprietary)	Android	BlackBerry OS
Network Bands	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900 AMPS: 850	GSM: 900, 1800, 1900	4G LTE: 2, 4, 5, 12, 13, 25 WCDMA: 2, 4, 5 CDMA: 850, 1900 GSM: 850, 900, 1800, 1900	CDMA: 800, 850, 1900 *
Data Technology	HSPA+ 21	1xRTT	EDGE	LTE (Cat 4)	EVDO rA
Features
Fingerprint Reader	-	-	-	Yes stand-alone	-
Flashlight	-	-	-	Yes	-
GPS / Location	n/a	Yes	-	n/a	n/a
Accessibility
Adjustable Text Size	n/a	-	-	n/a	n/a
Hearing Aid Compatible	Yes	-	-	Yes	Yes
Multiple Languages	n/a	Yes	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	-	Yes	Yes
Alerts
Ringer Profiles	-	-	-	-	Yes
Connectivity
Bluetooth	Yes	-	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio
Mobile Hotspot	n/a	-	-	n/a	n/a
NFC	-	-	-	-	Yes
USB	Yes	-	Yes	Yes USB Type C	Yes Micro-USB
Wi-Fi	Yes	-	-	Yes 5 (802.11 ac,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	Yes	-	n/a	n/a
Customization
Custom Graphics	n/a	Yes	Yes	n/a	n/a
Custom Ringtones	n/a	Yes	Yes	n/a	n/a
Real-Music Ringers	n/a	-	Yes	n/a	n/a
Data & Network
Data Tethering	n/a	Yes	-	n/a	n/a
External Antenna Jack	n/a	-	Yes	n/a	n/a
WAP / Web Browser	n/a	Yes	Yes	n/a	n/a
Input
Predictive Text Entry	n/a	Yes	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	Yes	-	-	Yes	-
Memory
Memory Card Slot	Yes	-	-	Yes	Yes
Messaging
Email Client	n/a	-	Yes	n/a	n/a
EMS / Picture Messaging	n/a	Yes	Yes	n/a	n/a
Instant Messaging	n/a	-	-	n/a	n/a
MMS	n/a	-	Yes	n/a	n/a
Text Messaging Templates	n/a	-	Yes	n/a	n/a
Music
Headphone Jack (3.5mm)	Yes	-	-	Yes	Yes
Music Player	n/a	-	-	n/a	n/a
Photo & Video
TV Output	-	-	Yes	-	-
Power
Fast Charging	-	-	-	Yes	-
Productivity
Alarm	n/a	Yes	Yes	n/a	n/a
Calculator	n/a	Yes	Yes	n/a	n/a
Calendar	n/a	Yes	Yes	n/a	n/a
To-Do List	n/a	-	Yes	n/a	n/a
Voice Memo	n/a	Yes	Yes	n/a	n/a
Software
BREW	n/a	Yes	-	n/a	n/a
Games	n/a	Yes	Yes	n/a	n/a
Java (J2ME)	n/a	-	Yes	n/a	n/a
Voice
Headset Jack (2.5 mm)	n/a	Yes	-	n/a	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Nokia Lumia 521 / 520	Audiovox CDM-8400 / CDM-8410	Samsung SGH-X820	ZTE Blade Max 3 / Max Blue	BlackBerry Curve 9350
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Nokia Lumia 521 / 520	Audiovox CDM-8400 / CDM-8410	Samsung SGH-X820	ZTE Blade Max 3 / Max Blue	BlackBerry Curve 9350