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Phone	Apple iPhone 4 (GSM)	HTC Amaze 4G	HTC Touch Pro2 (CDMA)	Sony Ericsson P910	Samsung Knack U310
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	3.5" diag. 5 : 3	4.3" diag. 16 : 9	3.6" diag. 5 : 3	?	2.2" diag. 4 : 3
Display Resolution & Type	640 x 960 pixels (~330 ppi) LCD (TFT/TFD)	540 x 960 pixels (~256 ppi) LCD (TFT/TFD)	480 x 800 pixels (~259 ppi) LCD (TFT/TFD)	208 x 320 pixels LCD (TFT/TFD)	176 x 220 pixels (~128 ppi) LCD (TFT/TFD)
Display Refresh	60 Hz	60 Hz	?	?	?
Battery	?	1,730 mAh	1,500 mAh	?	1,000 mAh
Processor	Apple A4	1.5 GHz Qualcomm Snapdragon S3 dual-core	528 MHz MSM7600	?	?
RAM	?	1 GB	?	?	?
Storage	32 GB *	16 GB	? raw hardware	? raw hardware	? raw hardware
Main Camera	5 megapixel	8 megapixel	3 megapixel	Yes	-
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	1080p HD	?	QCIF (176 x 144)	-
Front Camera	Yes	2 megapixel	-	-	-
Weight	4.8 oz (136g)	6.1 oz (173g)	6.35 oz (180g)	5.47 oz (155g)	3.63 oz (103g)
Dimensions	4.5" x 2.31" x 0.37" (114 x 59 x 9.4 mm)	5.12" x 2.58" x 0.46" (130 x 66 x 11.7 mm)	4.57" x 2.33" x 0.68" (116 x 59 x 17.3 mm)	4.53" x 2.28" x 1.02" (115 x 58 x 25.9 mm)	3.78" x 2.01" x 0.74" (96 x 51 x 18.8 mm)
Form Factor	Slab	Slab	Slab	Flip	Clamshell
Platform / OS	iOS	Android	Windows Mobile Professional	UIQ (Symbian)	(proprietary)
Network Bands	WCDMA: 1, 2, 5, 8 GSM: 850, 900, 1800, 1900	WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1 CDMA: 850, 1900 GSM: 850, 900, 1800, 1900	GSM: 850, 1800, 1900 *	CDMA: 850, 1900
Data Technology	HSPA 7.2	HSPA+ 42	EVDO rA	GPRS	-
Features
Flashlight	-	Yes	-	-	-
GPS / Location	n/a	n/a	n/a	n/a	Yes
Accessibility
Adjustable Text Size	n/a	n/a	n/a	n/a	Yes
Hearing Aid Compatible	Yes M3, T3 (mostly tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)	Yes M4, T3 (mostly tele-coil compatible)	-	Yes M4, T4 (very tele-coil compatible)
Multiple Languages	n/a	n/a	n/a	n/a	Yes
TTY/TDD (Digital)	Yes	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	-	-	-	Yes
Ringer Profiles	-	-	-	Yes	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes	-
Infrared (IR)	-	-	-	Yes	-
Mobile Hotspot	n/a	n/a	n/a	n/a	-
NFC	-	Yes	-	-	-
USB	Yes	Yes	Yes	Yes	-
Wi-Fi	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 a,b,g,n)	Yes	-	-
Contacts
Picture ID	n/a	n/a	n/a	n/a	-
Ringer ID	n/a	n/a	n/a	n/a	-
Voice Dialing	n/a	n/a	n/a	n/a	Yes
Customization
Custom Graphics	n/a	n/a	n/a	n/a	-
Custom Ringtones	n/a	n/a	n/a	n/a	-
Real-Music Ringers	n/a	n/a	n/a	n/a	-
Data & Network
Data Tethering	n/a	n/a	n/a	n/a	-
WAP / Web Browser	n/a	n/a	n/a	n/a	-
Input
Predictive Text Entry	n/a	n/a	n/a	n/a	Yes
Side Keys	Yes	Yes	Yes	Yes	Yes
Stylus	-	-	Yes	-	-
Text Keyboard, Hardware	-	-	Yes	Yes	-
Touch Screen	Yes Capacitive	Yes Capacitive	Yes Resistive	Yes	-
Memory
Memory Card Slot	-	Yes	Yes	Yes	-
Messaging
Email Client	n/a	n/a	n/a	n/a	-
EMS / Picture Messaging	n/a	n/a	n/a	n/a	Yes
Instant Messaging	n/a	n/a	n/a	n/a	-
MMS	n/a	n/a	n/a	n/a	-
Text Messaging Templates	n/a	n/a	n/a	n/a	-
Music
FM Radio	-	Yes	-	-	-
Headphone Jack (3.5mm)	Yes	Yes	Yes	-	-
Music Player	n/a	n/a	n/a	n/a	-
Photo & Video
DLNA	-	Yes	-	-	-
TV Output	Yes	Yes	Yes	-	-
Productivity
Alarm	n/a	n/a	n/a	n/a	Yes
Calculator	n/a	n/a	n/a	n/a	Yes
Calendar	n/a	n/a	n/a	n/a	Yes
To-Do List	n/a	n/a	n/a	n/a	-
Voice Memo	n/a	n/a	n/a	n/a	-
Software
Games	n/a	n/a	n/a	n/a	-
Java (J2ME)	n/a	n/a	n/a	n/a	-
Voice
Headset Jack (2.5 mm)	n/a	n/a	n/a	n/a	Yes
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Apple iPhone 4 (GSM)	HTC Amaze 4G	HTC Touch Pro2 (CDMA)	Sony Ericsson P910	Samsung Knack U310
	X >	< X >	< X >	< X >	< X

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


Phone	Apple iPhone 4 (GSM)	HTC Amaze 4G	HTC Touch Pro2 (CDMA)	Sony Ericsson P910	Samsung Knack U310