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Phone	Ericsson T66	Palm Pre 2 (GSM)	Samsung SGH-D357	AT&T Vista	Pantech Matrix Pro C820
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	3.1" diag. 5 : 3	?	5.5" diag. 18 : 9	2.4" diag. 4 : 3
Display Resolution & Type	?	320 x 480 pixels (~186 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	720 x 1440 pixels (~293 ppi) LCD (TFT/TFD)	240 x 320 pixels (~167 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	60 Hz	?
Battery	?	1,150 mAh	800 mAh	2,450 mAh	1,320 mAh
Processor	?	1 GHz TI 3630	?	2 GHz MediaTek Helio A22 (MT6761V)	528 MHz ARM 11
RAM	?	?	?	3 GB	?
Storage	? raw hardware	? raw hardware	? raw hardware	32 GB	? raw hardware
Main Camera	-	5 megapixel	-	8 megapixel	2 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	VGA (640 x 480)	-	1080p HD	QCIF (176 x 144)
Front Camera	-	-	-	5 megapixel	-
Weight	2.08 oz (59g)	5.1 oz (145g)	3.46 oz (98g)	5.51 oz (156g)	5.34 oz (151g)
Dimensions	3.62" x 1.61" x 0.69" (92 x 41 x 17.5 mm)	3.96" x 2.35" x 0.67" (101 x 60 x 17 mm)	3.4" x 1.8" x 0.96" (86 x 46 x 24.4 mm)	5.88" x 2.82" x 0.35" (149 x 72 x 8.9 mm)	4.2" x 2" x 0.9" (107 x 51 x 22.9 mm)
Form Factor	Slab	Slide	Clamshell	Slab	Slide
Platform / OS	(proprietary)	webOS	(proprietary)	Android	Windows Mobile Standard
Network Bands	GSM: 900, 1800, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	GSM: 850, 1800, 1900	4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30 WCDMA: 1, 2, 4, 5, 8	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	-	HSDPA 3.6	EDGE	LTE (Cat 4)	HSDPA 3.6
Features
Flashlight	-	-	-	Yes	-
GPS / Location	-	n/a	-	n/a	n/a
Accessibility
Hearing Aid Compatible	-	-	-	Yes M4, T4 (very tele-coil compatible)	-
Multiple Languages	Yes	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	-	Yes	Yes	-	Yes
Alerts
Extra Display	-	-	Yes	-	-
Ringer Profiles	Yes	-	-	-	Yes
Connectivity
Bluetooth	-	Yes	Yes	Yes	Yes
USB	-	Yes Micro-USB	-	Yes USB Type C	Yes
Wi-Fi	-	Yes 802.11 b,g	-	Yes	-
Contacts
Picture ID	-	n/a	Yes	n/a	n/a
Ringer ID	-	n/a	Yes	n/a	n/a
Voice Dialing	-	n/a	Yes	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	-	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
Touch Screen	-	Yes Capacitive	-	Yes Capacitive	-
Memory
Memory Card Slot	-	-	-	Yes	Yes
Messaging
Email Client	-	n/a	Yes	n/a	n/a
EMS / Picture Messaging	Yes	n/a	Yes	n/a	n/a
Instant Messaging	-	n/a	Yes	n/a	n/a
MMS	-	n/a	Yes	n/a	n/a
Text Messaging Templates	Yes	n/a	Yes	n/a	n/a
Music
Headphone Jack (3.5mm)	-	Yes	-	Yes	-
Music Player	-	n/a	-	n/a	n/a
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	Yes	n/a	n/a
Voice Memo	-	n/a	Yes	n/a	n/a
Software
Games	Yes	n/a	Yes	n/a	n/a
Java (J2ME)	-	n/a	Yes	n/a	n/a
Voice
HD Voice	-	-	-	Yes	-
Headset Jack (2.5 mm)	-	n/a	Yes	n/a	n/a
Push-To-Talk	-	-	Yes	-	-
Speaker Phone	-	Yes	Yes	Yes	Yes
	Ericsson T66	Palm Pre 2 (GSM)	Samsung SGH-D357	AT&T Vista	Pantech Matrix Pro C820
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NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Ericsson T66	Palm Pre 2 (GSM)	Samsung SGH-D357	AT&T Vista	Pantech Matrix Pro C820