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Phone	Motorola Charm	HTC Windows Phone 8S	Samsung SGH-A717	Ericsson T39	HTC Surround
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	2.8" diag. 4 : 3	4" diag. 5 : 3	?	?	3.8" diag. 5 : 3
Display Resolution & Type	320 x 240 pixels (~143 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	240 x 320 pixels LCD (TFT/TFD)	? LCD (Grayscale)	480 x 800 pixels (~246 ppi) LCD (TFT/TFD)
Display Refresh	60 Hz	?	?	?	?
Battery	1,170 mAh	1,700 mAh	?	?	1,230 mAh
Processor	720 MHz TI OMAP3410	1 GHz Qualcomm Snapdragon S4	?	?	1 GHz Qualcomm Snapdragon S1 QSD8250
RAM	?	512 MB	?	?	?
Storage	? raw hardware	4 GB	? raw hardware	? raw hardware	? raw hardware
Main Camera	3 megapixel	5 megapixel	2 megapixel	-	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	720p HD	QCIF (176 x 144)	-	720p HD
Front Camera	-	-	-	-	-
Weight	3.88 oz (110g)	3.99 oz (113g)	3.31 oz (94g)	3.03 oz (86g)	6.02 oz (171g)
Dimensions	3.87" x 2.65" x 0.45" (98 x 67 x 11.4 mm)	4.74" x 2.48" x 0.4" (121 x 63 x 10.3 mm)	4.07" x 2.15" x 0.55" (103 x 55 x 14 mm)	3.78" x 1.97" x 0.71" (96 x 50 x 18 mm)	4.72" x 2.44" x 0.54" (120 x 62 x 13.7 mm)
Form Factor	Slab	Slab	Clamshell	Flip	Slab
Platform / OS	Android	Windows	(proprietary)	(proprietary)	Windows
Network Bands	WCDMA: 4 GSM: 850, 900, 1800, 1900 *	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	GSM: 900, 1800, 1900	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	HSDPA 3.6	HSPA+ 21	HSDPA 1.8	GPRS	HSPA 7.2
Features
Flashlight	-	Yes	-	-	-
GPS / Location	n/a	n/a	-	-	n/a
Accessibility
Hearing Aid Compatible	-	Yes M3, T3 (mostly tele-coil compatible)	Yes M3 (mostly compatible)	-	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	n/a	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	-	Yes
Alerts
Extra Display	-	-	Yes	-	-
Ringer Profiles	-	-	Yes	Yes	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Infrared (IR)	-	-	-	Yes	-
USB	Yes Micro-USB	Yes	Yes	-	Yes Micro-USB
Wi-Fi	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 b,g,n)	-	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	n/a	n/a	Yes	-	n/a
Ringer ID	n/a	n/a	Yes	-	n/a
Voice Dialing	n/a	n/a	-	Yes	n/a
Customization
Custom Graphics	n/a	n/a	Yes	Yes	n/a
Custom Ringtones	n/a	n/a	Yes	Yes	n/a
Real-Music Ringers	n/a	n/a	Yes	-	n/a
Data & Network
Data Tethering	n/a	n/a	Yes	Yes	n/a
WAP / Web Browser	n/a	n/a	Yes	Yes	n/a
Input
Predictive Text Entry	n/a	n/a	Yes	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	Yes	-	-	-	-
Touch Screen	Yes Capacitive	Yes Capacitive	-	-	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	Yes	-	-
Messaging
Email Client	n/a	n/a	Yes	-	n/a
Instant Messaging	n/a	n/a	Yes	-	n/a
MMS	n/a	n/a	Yes	-	n/a
Text Messaging Templates	n/a	n/a	Yes	Yes	n/a
Music
FM Radio	-	-	-	-	Yes
Headphone Jack (3.5mm)	Yes	Yes	-	-	Yes
Music Player	n/a	n/a	Yes	-	n/a
Stereo Speakers	-	-	-	-	Yes
Productivity
Alarm	n/a	n/a	Yes	Yes	n/a
Calculator	n/a	n/a	Yes	Yes	n/a
Calendar	n/a	n/a	Yes	Yes	n/a
To-Do List	n/a	n/a	Yes	-	n/a
Voice Memo	n/a	n/a	Yes	Yes	n/a
Software
Games	n/a	n/a	Yes	Yes	n/a
Java (J2ME)	n/a	n/a	Yes	-	n/a
Voice
Speaker Phone	Yes	Yes	Yes	-	Yes
	Motorola Charm	HTC Windows Phone 8S	Samsung SGH-A717	Ericsson T39	HTC Surround
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Motorola Charm	HTC Windows Phone 8S	Samsung SGH-A717	Ericsson T39	HTC Surround