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Phone	Motorola V551 / V330 / V547 / V555 / V557	HP iPAQ hw6510 / hw6515	Motorola Charm	Sony Ericsson Z550a	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	1.9" diag. 4 : 3	3.8" diag. 5 : 3
Display Resolution & Type	176 x 220 pixels LCD (TFT/TFD)	240 x 240 pixels LCD (TFT/TFD)	320 x 240 pixels (~143 ppi) LCD (TFT/TFD)	176 x 220 pixels (~148 ppi) LCD (TFT/TFD)	480 x 800 pixels (~246 ppi) LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	?	?
Battery	820 mAh	1,200 mAh	1,170 mAh	?	1,230 mAh
Processor	?	312 MHz Intel XScale PXA272	720 MHz TI OMAP3410	?	1 GHz Qualcomm Snapdragon S1 QSD8250
RAM	?	?	?	?	?
Storage	? raw hardware	? raw hardware	? raw hardware	? raw hardware	? raw hardware
Main Camera	Yes	1 megapixel	3 megapixel	1 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	?	?	?	720p HD
Front Camera	-	-	-	-	-
Weight	4.23 oz (120g)	5.8 oz (164g)	3.88 oz (110g)	3.26 oz (92g)	6.02 oz (171g)
Dimensions	3.5" x 1.93" x 0.97" (89 x 49 x 24.6 mm)	4.65" x 2.8" x 0.71" (118 x 71 x 18 mm)	3.87" x 2.65" x 0.45" (98 x 67 x 11.4 mm)	3.43" x 1.77" x 0.79" (87 x 45 x 20.1 mm)	4.72" x 2.44" x 0.54" (120 x 62 x 13.7 mm)
Form Factor	Clamshell	Slab	Slab	Clamshell	Slab
Platform / OS	(proprietary)	Windows Mobile Professional	Android	(proprietary)	Windows
Network Bands	GSM: 850, 900, 1800, 1900 *	GSM: 850, 900, 1800, 1900	WCDMA: 4 GSM: 850, 900, 1800, 1900 *	GSM: 850, 900, 1800, 1900 *	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	EDGE	EDGE	HSDPA 3.6	GPRS	HSPA 7.2
Features
GPS / Location	-	n/a	n/a	-	n/a
Accessibility
Hearing Aid Compatible	-	-	-	-	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	n/a	n/a	Yes	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	Yes	Yes
Alerts
Extra Display	Yes	-	-	Yes	-
Ringer Profiles	Yes	Yes	-	Yes	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Infrared (IR)	-	Yes	-	-	-
USB	Yes	Yes	Yes Micro-USB	Yes	Yes Micro-USB
Wi-Fi	-	-	Yes 4 (802.11 b,g,n)	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	Yes	n/a	n/a	Yes	n/a
Ringer ID	Yes	n/a	n/a	Yes	n/a
Voice Dialing	Yes	n/a	n/a	Yes	n/a
Customization
Custom Graphics	Yes	n/a	n/a	Yes	n/a
Custom Ringtones	Yes	n/a	n/a	Yes	n/a
Real-Music Ringers	Yes	n/a	n/a	Yes	n/a
Data & Network
Data Tethering	Yes	n/a	n/a	Yes	n/a
WAP / Web Browser	Yes	n/a	n/a	Yes	n/a
Input
Predictive Text Entry	Yes	n/a	n/a	Yes	n/a
Side Keys	Yes	-	Yes	Yes	Yes
Text Keyboard, Hardware	-	Yes	Yes	-	-
Touch Screen	-	Yes	Yes Capacitive	-	Yes Capacitive
Memory
Memory Card Slot	-	Yes	Yes	Yes	-
Messaging
Email Client	Yes	n/a	n/a	Yes	n/a
EMS / Picture Messaging	Yes	n/a	n/a	-	n/a
Instant Messaging	Yes	n/a	n/a	-	n/a
MMS	Yes	n/a	n/a	Yes	n/a
Text Messaging Templates	Yes	n/a	n/a	Yes	n/a
Music
FM Radio	-	-	-	Yes	Yes
Headphone Jack (3.5mm)	-	-	Yes	-	Yes
Music Player	-	n/a	n/a	Yes	n/a
Stereo Speakers	-	-	-	-	Yes
Productivity
Alarm	Yes	n/a	n/a	Yes	n/a
Calculator	Yes	n/a	n/a	Yes	n/a
Calendar	Yes	n/a	n/a	Yes	n/a
To-Do List	-	n/a	n/a	Yes	n/a
Voice Memo	Yes	n/a	n/a	Yes	n/a
Software
Games	Yes	n/a	n/a	Yes	n/a
Java (J2ME)	Yes	n/a	n/a	Yes	n/a
Voice
Headset Jack (2.5 mm)	Yes	n/a	n/a	-	n/a
Push-To-Talk	-	-	-	Yes *	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Motorola V551 / V330 / V547 / V555 / V557	HP iPAQ hw6510 / hw6515	Motorola Charm	Sony Ericsson Z550a	HTC Surround
	X >	< X >	< X >	< X >	< X

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


Phone	Motorola V551 / V330 / V547 / V555 / V557	HP iPAQ hw6510 / hw6515	Motorola Charm	Sony Ericsson Z550a	HTC Surround