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Phone	Siemens SL65	ZTE Z998 / Unico LTE	Siemens CT66 / C66 / C65 / C71 / C70	Samsung SCH-A310	HTC EVO Design 4G / Hero S (CDMA)
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	4.5" diag. 16 : 9	?	?	4" diag. 16 : 9
Display Resolution & Type	130 x 130 pixels LCD (TFT/TFD)	540 x 960 pixels (~245 ppi) LCD (TFT/TFD)	130 x 130 pixels LCD (Color)	128 x 128 pixels LCD (Grayscale)	540 x 960 pixels (~275 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	60 Hz
Battery	700 mAh	2,070 mAh	600 mAh	?	1,520 mAh
Processor	?	1.2 GHz Qualcomm Snapdragon 400 MSM8930	?	?	1.2 GHz Qualcomm Snapdragon S2 MSM8655
RAM	?	1 GB	?	?	768 MB
Storage	? raw hardware	4 GB	? raw hardware	? raw hardware	4 GB
Main Camera	-	5 megapixel	Yes	-	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	?	720p HD	-	-	720p HD
Front Camera	-	1 megapixel	-	-	1 megapixel
Weight	3.49 oz (99g)	4.8 oz (136g)	3 oz (85g)	3.2 oz (91g)	5.22 oz (148g)
Dimensions	3.55" x 1.87" x 0.82" (90 x 47 x 20.8 mm)	5.2" x 2.6" x 0.4" (132 x 66 x 10.2 mm)	4.1" x 1.8" x 0.7" (104 x 46 x 17.8 mm)	3.43" x 1.89" x 0.87" (87 x 48 x 22.1 mm)	4.78" x 2.44" x 0.46" (122 x 62 x 11.8 mm)
Form Factor	Slide	Slab	Slab	Clamshell	Slab
Platform / OS	(proprietary)	Android	(proprietary)	(proprietary)	Android
Network Bands	GSM: 900, 1800, 1900	4G LTE: 2, 4, 5, 17 WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 *	GSM: 850, 1800, 1900 *	CDMA: 850, 1900 AMPS: 850	4G WiMAX: 41 WCDMA: 1, 8 CDMA: 800, 850, 1900 GSM: 850, 1900 *
Data Technology	GPRS	LTE (Cat 3)	GPRS	1xRTT	WiMAX
Features
Flashlight	-	-	-	-	Yes
GPS / Location	-	n/a	-	Yes	n/a
Accessibility
Adjustable Text Size	-	n/a	-	-	n/a
Hearing Aid Compatible	-	Yes M3, T4 (very tele-coil compatible)	-	-	Yes M4, T4 (very tele-coil compatible)
Multiple Languages	Yes	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	-	Yes	-	-	Yes
Alerts
Extra Display	-	-	-	Yes	-
Ringer Profiles	Yes	-	Yes	-	-
Connectivity
Bluetooth	-	Yes	-	-	Yes
Infrared (IR)	Yes	-	Yes	-	-
Mobile Hotspot	-	n/a	-	-	n/a
USB	Yes	Yes Micro-USB	Yes	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	Yes	-	n/a
Ringer ID	Yes	n/a	Yes	-	n/a
Voice Dialing	-	n/a	-	Yes	n/a
Customization
Changeable Body Plates	-	-	Yes	Yes	-
Custom Graphics	Yes	n/a	Yes	-	n/a
Custom Ringtones	Yes	n/a	Yes	-	n/a
Real-Music Ringers	-	n/a	-	-	n/a
Data & Network
Data Tethering	Yes	n/a	-	Yes	n/a
WAP / Web Browser	Yes	n/a	Yes	Yes	n/a
Input
Predictive Text Entry	Yes	n/a	Yes	Yes	n/a
Side Keys	Yes	Yes	-	Yes	Yes
Touch Screen	-	Yes Capacitive	-	-	Yes Capacitive
Memory
Memory Card Slot	-	Yes	-	-	Yes
Messaging
Email Client	Yes	n/a	-	-	n/a
EMS / Picture Messaging	Yes	n/a	Yes	-	n/a
Instant Messaging	-	n/a	-	-	n/a
MMS	Yes	n/a	Yes	-	n/a
Text Messaging Templates	Yes	n/a	Yes	-	n/a
Music
FM Radio	-	-	-	-	Yes
Headphone Jack (3.5mm)	-	Yes	-	-	Yes
Music Player	-	n/a	-	-	n/a
Photo & Video
DLNA	-	-	-	-	Yes
Productivity
Alarm	Yes	n/a	Yes	-	n/a
Calculator	Yes	n/a	Yes	-	n/a
Calendar	Yes	n/a	Yes	Yes	n/a
To-Do List	Yes	n/a	Yes	-	n/a
Voice Memo	Yes	n/a	Yes	Yes	n/a
Software
Games	Yes	n/a	Yes	Yes	n/a
Java (J2ME)	Yes	n/a	Yes	-	n/a
Voice
Call Screening	-	-	Yes	-	-
Headset Jack (2.5 mm)	-	n/a	-	Yes	n/a
Push-To-Talk	-	-	Yes *	-	-
Speaker Phone	Yes	Yes	Yes	-	Yes
	* Some versions only
	Siemens SL65	ZTE Z998 / Unico LTE	Siemens CT66 / C66 / C65 / C71 / C70	Samsung SCH-A310	HTC EVO Design 4G / Hero S (CDMA)
	X >	< X >	< X >	< X >	< X

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


Phone	Siemens SL65	ZTE Z998 / Unico LTE	Siemens CT66 / C66 / C65 / C71 / C70	Samsung SCH-A310	HTC EVO Design 4G / Hero S (CDMA)