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Specifications
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Phone	Palm Treo 650 (CDMA)	Samsung SGH-A157	HTC Touch Pro2 (GSM) / Tilt 2	HTC EVO 4G
Current U.S. Carriers	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released
Display Size	?	1.8" diag. 4 : 3	3.6" diag. 5 : 3	4.3" diag. 5 : 3
Display Resolution & Type	320 x 320 pixels LCD (TFT/TFD)	128 x 160 pixels (~116 ppi) LCD (TFT/TFD)	480 x 800 pixels (~259 ppi) LCD (TFT/TFD)	480 x 800 pixels (~217 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	60 Hz
Battery	?	800 mAh	1,500 mAh	1,500 mAh
Processor	312 MHz Intel XScale PXA270	?	528 MHz Qualcomm MSM7200A	1 GHz Qualcomm Snapdragon S1 QSD8650
RAM	?	?	?	?
Storage	? raw hardware	256 MB	? raw hardware	? raw hardware
Main Camera	Yes	-	3 megapixel	8 megapixel
Wide Camera	-	-	-	-
Tele Camera	-	-	-	-
Video Capture	QVGA (320 x 240)	-	?	720p HD
Front Camera	-	-	-	Yes
Weight	6.3 oz (179g)	2.99 oz (85g)	6.61 oz (187g)	6 oz (170g)
Dimensions	4.4" x 2.3" x 0.9" (112 x 58 x 22.9 mm)	3.83" x 1.84" x 0.65" (97 x 47 x 16.5 mm)	4.59" x 2.36" x 0.68" (117 x 60 x 17.3 mm)	4.8" x 2.6" x 0.5" (122 x 66 x 12.7 mm)
Form Factor	Slab	Clamshell	Slab	Slab
Platform / OS	Palm OS	(proprietary)	Windows Mobile Professional	Android
Network Bands	CDMA: 850, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900 *	4G WiMAX: 41 CDMA: 850, 1900
Data Technology	1xRTT	?	HSPA 7.2	WiMAX
Features
GPS / Location	n/a	Yes	n/a	n/a
Accessibility
Adjustable Text Size	n/a	Yes	n/a	n/a
Hearing Aid Compatible	-	Yes M4 (very compatible)	-	Yes
Multiple Languages	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	-	Yes	Yes	Yes
Alerts
Ringer Profiles	-	Yes	-	-
Connectivity
Bluetooth	Yes	-	Yes	Yes
Infrared (IR)	Yes	-	-	-
Mobile Hotspot	n/a	-	n/a	n/a
USB	-	Yes Micro-USB	Yes	Yes
Wi-Fi	-	-	Yes 802.11 b,g	Yes 802.11 b,g
Contacts
Picture ID	n/a	Yes	n/a	n/a
Ringer ID	n/a	Yes	n/a	n/a
Voice Dialing	n/a	-	n/a	n/a
Customization
Custom Graphics	n/a	Yes	n/a	n/a
Custom Ringtones	n/a	Yes	n/a	n/a
Real-Music Ringers	n/a	Yes	n/a	n/a
Data & Network
Data Tethering	n/a	-	n/a	n/a
WAP / Web Browser	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	n/a	Yes	n/a	n/a
Side Keys	Yes	-	Yes	Yes
Stylus	-	-	Yes	-
Text Keyboard, Hardware	Yes	-	Yes	-
Touch Screen	Yes	-	Yes	Yes Capacitive
Memory
Memory Card Slot	Yes	-	Yes	Yes
Messaging
Email Client	n/a	-	n/a	n/a
Instant Messaging	n/a	-	n/a	n/a
MMS	n/a	Yes	n/a	n/a
Text Messaging Templates	n/a	Yes	n/a	n/a
Music
FM Radio	-	-	-	Yes
Headphone Jack (3.5mm)	-	-	-	Yes
Music Player	n/a	-	n/a	n/a
Photo & Video
TV Output	-	-	Yes	Yes
Video Calling	n/a	-	n/a	n/a
Productivity
Alarm	n/a	Yes	n/a	n/a
Calculator	n/a	Yes	n/a	n/a
Calendar	n/a	Yes	n/a	n/a
To-Do List	n/a	Yes	n/a	n/a
Voice Memo	n/a	Yes	n/a	n/a
Software
Games	n/a	-	n/a	n/a
Java (J2ME)	n/a	-	n/a	n/a
Voice
Headset Jack (2.5 mm)	n/a	-	n/a	n/a
Push-To-Talk	-	-	Yes *	-
Speaker Phone	Yes	Yes	Yes	Yes
	* Some versions only
	Palm Treo 650 (CDMA)	Samsung SGH-A157	HTC Touch Pro2 (GSM) / Tilt 2	HTC EVO 4G
	X >	< X >	< X >	< X

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


Phone	Palm Treo 650 (CDMA)	Samsung SGH-A157	HTC Touch Pro2 (GSM) / Tilt 2	HTC EVO 4G