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Phone	Motorola V551 / V330 / V547 / V555 / V557	HTC Touch Pro2 (GSM) / Tilt 2	Motorola Backflip	Palm Treo 650 (CDMA)	Samsung MM-A900 / SPH-A900 / Ace
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	3.6" diag. 5 : 3	3.1" diag. 5 : 3	?	?
Display Resolution & Type	176 x 220 pixels LCD (TFT/TFD)	480 x 800 pixels (~259 ppi) LCD (TFT/TFD)	320 x 480 pixels (~186 ppi) LCD (TFT/TFD)	320 x 320 pixels LCD (TFT/TFD)	240 x 320 pixels LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	?	?
Battery	820 mAh	1,500 mAh	1,400 mAh	?	?
Processor	?	528 MHz Qualcomm MSM7200A	528 MHz Qualcomm MSM7201a	312 MHz Intel XScale PXA270	?
RAM	?	?	?	?	?
Storage	? raw hardware	? raw hardware	? raw hardware	? raw hardware	? raw hardware
Main Camera	Yes	3 megapixel	5 megapixel	Yes	1 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	?	CIF (352 x 288)	QVGA (320 x 240)	?
Front Camera	-	-	-	-	-
Weight	4.23 oz (120g)	6.61 oz (187g)	4.7 oz (133g)	6.3 oz (179g)	3.9 oz (111g)
Dimensions	3.5" x 1.93" x 0.97" (89 x 49 x 24.6 mm)	4.59" x 2.36" x 0.68" (117 x 60 x 17.3 mm)	4.25" x 2.09" x 0.6" (108 x 53 x 15.3 mm)	4.4" x 2.3" x 0.9" (112 x 58 x 22.9 mm)	3.86" x 2.01" x 0.57" (98 x 51 x 14.5 mm)
Form Factor	Clamshell	Slab	Clamshell	Slab	Clamshell
Platform / OS	(proprietary)	Windows Mobile Professional	Android	Palm OS	(proprietary)
Network Bands	GSM: 850, 900, 1800, 1900 *	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900 *	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900	CDMA: 850, 1900
Data Technology	EDGE	HSPA 7.2	HSPA 7.2	1xRTT	EVDO r0
Features
GPS / Location	-	n/a	n/a	n/a	Yes
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a	-
Hearing Aid Compatible	-	-	Yes M3 (mostly compatible)	-	-
Multiple Languages	Yes	n/a	n/a	n/a	Yes
TTY/TDD (Digital)	Yes	Yes	-	-	Yes
Alerts
Extra Display	Yes	-	-	-	Yes
Ringer Profiles	Yes	-	-	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	Yes
Infrared (IR)	-	-	-	Yes	-
USB	Yes	Yes	Yes Micro-USB	-	Yes
Wi-Fi	-	Yes 802.11 b,g	Yes 802.11 b,g	-	-
Contacts
Picture ID	Yes	n/a	n/a	n/a	Yes
Ringer ID	Yes	n/a	n/a	n/a	Yes
Voice Dialing	Yes	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	Yes	n/a	n/a	n/a	-
Data & Network
Data Tethering	Yes	n/a	n/a	n/a	Yes
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	Yes
Stylus	-	Yes	-	-	-
Text Keyboard, Hardware	-	Yes	Yes	Yes	-
Touch Screen	-	Yes	Yes Capacitive	Yes	-
Memory
Memory Card Slot	-	Yes	Yes	Yes	-
Messaging
Email Client	Yes	n/a	n/a	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	n/a	-
Text Messaging Templates	Yes	n/a	n/a	n/a	Yes
Music
Headphone Jack (3.5mm)	-	-	Yes	-	-
Music Player	-	n/a	n/a	n/a	Yes
Photo & Video
TV Output	-	Yes	-	-	-
Video Calling	-	n/a	n/a	n/a	-
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	-	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
Headset Jack (2.5 mm)	Yes	n/a	n/a	n/a	Yes
Push-To-Talk	-	Yes *	-	-	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Motorola V551 / V330 / V547 / V555 / V557	HTC Touch Pro2 (GSM) / Tilt 2	Motorola Backflip	Palm Treo 650 (CDMA)	Samsung MM-A900 / SPH-A900 / Ace
	X >	< X >	< X >	< X >	< X

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


Phone	Motorola V551 / V330 / V547 / V555 / V557	HTC Touch Pro2 (GSM) / Tilt 2	Motorola Backflip	Palm Treo 650 (CDMA)	Samsung MM-A900 / SPH-A900 / Ace