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Phone	Samsung SGH-X640	HTC SDA (USA) / SP5m (Tornado)	HTC Desire 555	Nokia Lumia 810	Nokia 8801 / 8800
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	2.2" diag. 4 : 3	5" diag. 16 : 9	4.3" diag. 5 : 3	?
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	240 x 320 pixels (~182 ppi) LCD (TFT/TFD)	720 x 1280 pixels (~294 ppi) LCD (TFT/TFD)	480 x 800 pixels (~217 ppi) AMOLED	208 x 208 pixels LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	?	?
Battery	800 mAh	?	2,200 mAh	1,800 mAh	600 mAh
Processor	?	?	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)	1.5 GHz Qualcomm Snapdragon	?
RAM	?	?	2 GB	1 GB	?
Storage	? raw hardware	? raw hardware	16 GB	8 GB	? raw hardware
Main Camera	Yes	1 megapixel	8 megapixel	8 megapixel	Yes
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	QCIF (176 x 144)	720p HD	1080p HD	QCIF (176 x 144)
Front Camera	-	-	5 megapixel	1 megapixel	-
Weight	3 oz (85g)	3.74 oz (106g)	4.93 oz (140g)	5.11 oz (145g)	4.82 oz (137g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.53" x 1.82" x 0.69" (115 x 46 x 17.5 mm)	5.78" x 2.79" x 0.33" (147 x 71 x 8.4 mm)	5" x 2.69" x 0.44" (127 x 68 x 11.2 mm)	4.21" x 1.77" x 0.63" (107 x 45 x 16 mm)
Form Factor	Clamshell	Slab	Slab	Slab	Slide
Platform / OS	(proprietary)	Windows Mobile Standard	Android	Windows	(proprietary)
Network Bands	GSM: 900, 1800, 1900	GSM: 850, 900, 1800, 1900	4G LTE: 2, 4, 5, 12 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	GSM: 850, 1800, 1900 *
Data Technology	GPRS	EDGE	LTE (Cat 4)	HSPA+ 42	EDGE
Features
Flashlight	-	-	Yes	-	-
GPS / Location	-	n/a	n/a	n/a	-
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a	-
Hearing Aid Compatible	-	-	Yes * M4, T4 (very tele-coil compatible)	Yes M3, T4 (very tele-coil compatible)	-
Multiple Languages	Yes	n/a	n/a	n/a	Yes
TTY/TDD (Digital)	-	Yes	Yes	Yes	-
Alerts
Ringer Profiles	-	Yes	-	-	Yes
Connectivity
Bluetooth	-	Yes	Yes	Yes	Yes
Infrared (IR)	-	Yes	-	-	-
Mobile Hotspot	-	n/a	n/a	n/a	-
NFC	-	-	-	Yes	-
USB	-	Yes Mini-USB	Yes Micro-USB	Yes Micro-USB	-
Wi-Fi	-	Yes	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 a,b,g,n)	-
Contacts
Picture ID	Yes	n/a	n/a	n/a	Yes
Ringer ID	Yes	n/a	n/a	n/a	-
Voice Dialing	-	n/a	n/a	n/a	Yes
Customization
Custom Graphics	Yes	n/a	n/a	n/a	Yes
Custom Ringtones	Yes	n/a	n/a	n/a	Yes
Real-Music Ringers	-	n/a	n/a	n/a	Yes
Data & Network
Data Tethering	-	n/a	n/a	n/a	Yes
External Antenna Jack	-	n/a	n/a	n/a	-
WAP / Web Browser	Yes	n/a	n/a	n/a	Yes
Input
Predictive Text Entry	Yes	n/a	n/a	n/a	Yes
Side Keys	Yes	Yes	Yes	Yes	-
Touch Screen	-	-	Yes Capacitive	Yes Capacitive	-
Memory
Memory Card Slot	-	Yes	Yes	Yes	-
Messaging
Email Client	-	n/a	n/a	n/a	Yes
EMS / Picture Messaging	Yes	n/a	n/a	n/a	-
Instant Messaging	-	n/a	n/a	n/a	-
MMS	Yes	n/a	n/a	n/a	Yes
Text Messaging Templates	Yes	n/a	n/a	n/a	Yes
Music
FM Radio	-	-	Yes	-	Yes
Headphone Jack (3.5mm)	-	-	Yes	Yes	-
Music Player	-	n/a	n/a	n/a	Yes
Photo & Video
DLNA	-	-	Yes	-	-
Miracast	-	-	Yes	-	-
Power
Wireless Charging	-	-	-	Yes	-
Productivity
Alarm	Yes	n/a	n/a	n/a	Yes
Calculator	Yes	n/a	n/a	n/a	Yes
Calendar	Yes	n/a	n/a	n/a	Yes
To-Do List	Yes	n/a	n/a	n/a	Yes
Voice Memo	Yes	n/a	n/a	n/a	Yes
Software
Games	Yes	n/a	n/a	n/a	Yes
Java (J2ME)	Yes	n/a	n/a	n/a	Yes
Voice
HD Voice	-	-	Yes	-	-
Headset Jack (2.5 mm)	Yes	n/a	n/a	n/a	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung SGH-X640	HTC SDA (USA) / SP5m (Tornado)	HTC Desire 555	Nokia Lumia 810	Nokia 8801 / 8800
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	HTC SDA (USA) / SP5m (Tornado)	HTC Desire 555	Nokia Lumia 810	Nokia 8801 / 8800