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Phone	Nokia Lumia 521 / 520	Samsung SGH-X640	Samsung SGH-X820	Samsung SCH-A990	Samsung Ace SPH-i325
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4" diag. 5 : 3	?	?	?	2.3" diag. 4 : 3
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	220 x 176 pixels LCD (TFT/TFD)	240 x 320 pixels LCD (TFT/TFD)	320 x 240 pixels (~174 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	?	?
Battery	1,430 mAh	800 mAh	650 mAh	1,000 mAh	1,300 mAh
Processor	1 GHz Qualcomm Snapdragon S4 MSM8270	?	?	?	416 MHz PXA270
RAM	512 MB	?	?	?	?
Storage	8 GB	? raw hardware	? raw hardware	? raw hardware	? raw hardware
Main Camera	5 megapixel	Yes	2 megapixel	3 megapixel	1 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	-	?	?	QVGA (320 x 240)
Front Camera	-	-	-	-	-
Weight	4.39 oz (124g)	3 oz (85g)	2.33 oz (66g)	4.4 oz (125g)	3.9 oz (111g)
Dimensions	4.72" x 2.52" x 0.39" (120 x 64 x 9.9 mm)	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.45" x 1.97" x 0.27" (113 x 50 x 6.9 mm)	3.8" x 1.88" x 0.82" (97 x 48 x 20.8 mm)	4.65" x 2.32" x 0.46" (118 x 59 x 11.7 mm)
Form Factor	Slab	Clamshell	Slab	Clamshell	Slab
Platform / OS	Windows	(proprietary)	(proprietary)	(proprietary)	Windows Mobile Standard
Network Bands	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 *	GSM: 900, 1800, 1900	GSM: 900, 1800, 1900	CDMA: 850, 1900	CDMA: 850, 1900 GSM: 900, 1800
Data Technology	HSPA+ 21	GPRS	EDGE	EVDO r0	EVDO r0
Features
Flashlight	-	-	-	Yes	-
GPS / Location	n/a	-	-	Yes	n/a
Accessibility
Hearing Aid Compatible	Yes M3, T4 (very tele-coil compatible)	-	-	Yes M3 (mostly compatible)	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	n/a	Yes	Yes	Yes	n/a
TTY/TDD (Digital)	Yes	-	-	Yes	Yes
Alerts
Extra Display	-	-	-	Yes	-
Ringer Profiles	-	-	-	-	Yes
Connectivity
Bluetooth	Yes	-	Yes	Yes	Yes
Mobile Hotspot	n/a	-	-	-	n/a
USB	Yes	-	Yes	Yes	Yes
Wi-Fi	Yes	-	-	-	-
Contacts
Picture ID	n/a	Yes	Yes	Yes	n/a
Ringer ID	n/a	Yes	Yes	Yes	n/a
Voice Dialing	n/a	-	-	Yes	n/a
Customization
Custom Graphics	n/a	Yes	Yes	Yes	n/a
Custom Ringtones	n/a	Yes	Yes	Yes	n/a
Real-Music Ringers	n/a	-	Yes	Yes	n/a
Data & Network
Data Tethering	n/a	-	-	Yes	n/a
External Antenna Jack	n/a	-	Yes	-	n/a
WAP / Web Browser	n/a	Yes	Yes	Yes	n/a
Input
Predictive Text Entry	n/a	Yes	Yes	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	Yes Capacitive	-	-	-	-
Memory
Memory Card Slot	Yes	-	-	Yes	Yes
Messaging
Email Client	n/a	-	Yes	-	n/a
EMS / Picture Messaging	n/a	Yes	Yes	Yes	n/a
Instant Messaging	n/a	-	-	-	n/a
MMS	n/a	Yes	Yes	Yes	n/a
Text Messaging Templates	n/a	Yes	Yes	Yes	n/a
Music
Headphone Jack (3.5mm)	Yes	-	-	-	-
Music Player	n/a	-	-	Yes	n/a
Stereo Speakers	-	-	-	Yes	-
Photo & Video
TV Output	-	-	Yes	Yes	-
Productivity
Alarm	n/a	Yes	Yes	Yes	n/a
Calculator	n/a	Yes	Yes	Yes	n/a
Calendar	n/a	Yes	Yes	Yes	n/a
To-Do List	n/a	Yes	Yes	-	n/a
Voice Memo	n/a	Yes	Yes	Yes	n/a
Software
BREW	n/a	-	-	Yes	n/a
Games	n/a	Yes	Yes	Yes	n/a
Java (J2ME)	n/a	Yes	Yes	-	n/a
Voice
Headset Jack (2.5 mm)	n/a	Yes	-	-	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Nokia Lumia 521 / 520	Samsung SGH-X640	Samsung SGH-X820	Samsung SCH-A990	Samsung Ace SPH-i325
	X >	< X >	< X >	< X >	< X

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


Phone	Nokia Lumia 521 / 520	Samsung SGH-X640	Samsung SGH-X820	Samsung SCH-A990	Samsung Ace SPH-i325