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Phone	Samsung SPH-A660 / VI660	ZTE Z998 / Unico LTE	Palm Treo 650 (CDMA)	HTC myTouch 4G Slide
Current U.S. Carriers	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released
Display Size	?	4.5" diag. 16 : 9	?	3.7" diag. 5 : 3
Display Resolution & Type	128 x 160 pixels LCD (Color)	540 x 960 pixels (~245 ppi) LCD (TFT/TFD)	320 x 320 pixels LCD (TFT/TFD)	480 x 800 pixels (~252 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	60 Hz
Battery	?	2,070 mAh	?	1,520 mAh
Processor	?	1.2 GHz Qualcomm Snapdragon 400 MSM8930	312 MHz Intel XScale PXA270	1.2 GHz Qualcomm Snapdragon S3 MSM8260 (dual-core)
RAM	?	1 GB	?	?
Storage	? raw hardware	4 GB	? raw hardware	? raw hardware
Main Camera	-	5 megapixel	Yes	8 megapixel
Wide Camera	-	-	-	-
Tele Camera	-	-	-	-
Video Capture	-	720p HD	QVGA (320 x 240)	1080p HD
Front Camera	-	1 megapixel	-	Yes
Weight	3.54 oz (100g)	4.8 oz (136g)	6.3 oz (179g)	6.5 oz (184g)
Dimensions	3.3" x 1.8" x 0.87" (84 x 46 x 22.1 mm)	5.2" x 2.6" x 0.4" (132 x 66 x 10.2 mm)	4.4" x 2.3" x 0.9" (112 x 58 x 22.9 mm)	4.8" x 2.4" x 0.52" (122 x 61 x 13.2 mm)
Form Factor	Clamshell	Slab	Slab	Slide
Platform / OS	(proprietary)	Android	Palm OS	Android
Network Bands	CDMA: 850, 1900 AMPS: 850	4G LTE: 2, 4, 5, 17 WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 *	CDMA: 850, 1900	WCDMA: 1, 4 GSM: 850, 900, 1800, 1900
Data Technology	1xRTT	LTE (Cat 3)	1xRTT	HSPA 14.4
Features
GPS / Location	Yes	n/a	n/a	n/a
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a
Hearing Aid Compatible	-	Yes M3, T4 (very tele-coil compatible)	-	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	n/a	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	-	-
Connectivity
Bluetooth	-	Yes	Yes	Yes
Infrared (IR)	-	-	Yes	-
Mobile Hotspot	-	n/a	n/a	n/a
USB	-	Yes Micro-USB	-	Yes
Wi-Fi	-	Yes 4 (802.11 b,g,n)	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	Yes	n/a	n/a	n/a
Ringer ID	Yes	n/a	n/a	n/a
Voice Dialing	Yes	n/a	n/a	n/a
Customization
Custom Graphics	Yes	n/a	n/a	n/a
Custom Ringtones	Yes	n/a	n/a	n/a
Real-Music Ringers	-	n/a	n/a	n/a
Data & Network
Data Tethering	Yes	n/a	n/a	n/a
WAP / Web Browser	Yes	n/a	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	-	Yes	Yes
Touch Screen	-	Yes Capacitive	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	n/a	n/a
Text Messaging Templates	-	n/a	n/a	n/a
Music
FM Radio	-	-	-	Yes
Headphone Jack (3.5mm)	-	Yes	-	Yes
Music Player	-	n/a	n/a	n/a
Photo & Video
DLNA	-	-	-	Yes
TV Output	-	-	-	Yes
Productivity
Alarm	Yes	n/a	n/a	n/a
Calculator	Yes	n/a	n/a	n/a
Calendar	Yes	n/a	n/a	n/a
To-Do List	Yes	n/a	n/a	n/a
Voice Memo	Yes	n/a	n/a	n/a
Software
Games	Yes	n/a	n/a	n/a
Java (J2ME)	Yes	n/a	n/a	n/a
Voice
Headset Jack (2.5 mm)	Yes	n/a	n/a	n/a
Speaker Phone	-	Yes	Yes	Yes
	* Some versions only
	Samsung SPH-A660 / VI660	ZTE Z998 / Unico LTE	Palm Treo 650 (CDMA)	HTC myTouch 4G Slide
	X >	< X >	< X >	< X

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


Phone	Samsung SPH-A660 / VI660	ZTE Z998 / Unico LTE	Palm Treo 650 (CDMA)	HTC myTouch 4G Slide