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Specifications
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Phone	Samsung SPH-A660 / VI660	Samsung Transform	ZTE Z431 / Altair	Pantech Duo C810	LG eXpo GW820
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	3.5" diag. 5 : 3	2.4" diag. 4 : 3	2.2" diag. 4 : 3	3.2" diag. 5 : 3
Display Resolution & Type	128 x 160 pixels LCD (Color)	320 x 480 pixels (~165 ppi) LCD (TFT/TFD)	320 x 240 pixels (~167 ppi) LCD (TFT/TFD)	240 x 320 pixels (~182 ppi) LCD (TFT/TFD)	480 x 800 pixels (~292 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	?
Battery	?	1,500 mAh	1,000 mAh	1,320 mAh	1,500 mAh
Processor	?	800 MHz Samsung S3C6410, Qualcomm QSC6085	?	ARM 920t PXA27x	?
RAM	?	?	?	?	?
Storage	? raw hardware	? raw hardware	? raw hardware	? raw hardware	? raw hardware
Main Camera	-	3 megapixel	2 megapixel	1 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	QVGA (320 x 240)	QVGA (320 x 240)	QVGA (320 x 240)	?
Front Camera	-	Yes	-	-	-
Weight	3.54 oz (100g)	5.37 oz (152g)	3.52 oz (100g)	3.88 oz (110g)	5.2 oz (147g)
Dimensions	3.3" x 1.8" x 0.87" (84 x 46 x 22.1 mm)	4.61" x 2.42" x 0.61" (117 x 61 x 15.5 mm)	4.49" x 2.39" x 0.41" (114 x 61 x 10.4 mm)	4.01" x 1.97" x 0.78" (102 x 50 x 19.8 mm)	4.45" x 2.16" x 0.63" (113 x 55 x 16 mm)
Form Factor	Clamshell	Slide	Slab	Slide	Slab
Platform / OS	(proprietary)	Android	(proprietary)	Windows Mobile Standard	Windows Mobile Professional
Network Bands	CDMA: 850, 1900 AMPS: 850	CDMA: 850, 1900	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	1xRTT	EVDO rA	?	HSDPA 1.8	HSPA 7.2
Features
Fingerprint Reader	-	-	-	-	Yes
GPS / Location	Yes	n/a	Yes	n/a	n/a
Accessibility
Adjustable Text Size	-	n/a	-	n/a	n/a
Hearing Aid Compatible	-	Yes M4, T3 (mostly tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)	-	-
Multiple Languages	Yes	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	-	Yes
Alerts
Ringer Profiles	-	-	Yes	Yes	Yes
Connectivity
Bluetooth	-	Yes	Yes	Yes	Yes
USB	-	Yes Micro-USB	Yes Micro-USB	Yes	Yes Micro-USB
Wi-Fi	-	Yes 4 (802.11 b,g,n)	-	-	Yes 802.11 b,g
Contacts
Picture ID	Yes	n/a	Yes	n/a	n/a
Ringer ID	Yes	n/a	Yes	n/a	n/a
Voice Dialing	Yes	n/a	-	n/a	n/a
Customization
Custom Graphics	Yes	n/a	Yes	n/a	n/a
Custom Ringtones	Yes	n/a	Yes	n/a	n/a
Real-Music Ringers	-	n/a	Yes	n/a	n/a
Data & Network
Data Tethering	Yes	n/a	Yes	n/a	n/a
WAP / Web Browser	Yes	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	Yes	n/a	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes	Yes
Text Keyboard, Hardware	-	Yes	Yes	Yes	Yes
Touch Screen	-	Yes Capacitive	-	-	Yes Resistive
Memory
Memory Card Slot	-	Yes	Yes	Yes	Yes
Messaging
Email Client	-	n/a	Yes	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	Yes	-	-
Music Player	-	n/a	Yes	n/a	n/a
Photo & Video
TV Output	-	-	-	-	Yes
Productivity
Alarm	Yes	n/a	Yes	n/a	n/a
Calculator	Yes	n/a	Yes	n/a	n/a
Calendar	Yes	n/a	Yes	n/a	n/a
To-Do List	Yes	n/a	-	n/a	n/a
Voice Memo	Yes	n/a	Yes	n/a	n/a
Software
BREW	-	n/a	Yes	n/a	n/a
Games	Yes	n/a	Yes	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	Yes
	Samsung SPH-A660 / VI660	Samsung Transform	ZTE Z431 / Altair	Pantech Duo C810	LG eXpo GW820
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SPH-A660 / VI660	Samsung Transform	ZTE Z431 / Altair	Pantech Duo C810	LG eXpo GW820