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Phone	Samsung SGH-X640	ZTE Flash	HTC Droid Incredible 4G LTE	HTC Desire 555	Casio G'zOne Boulder
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	5" diag. 16 : 9	2" diag. 4 : 3
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	720 x 1280 pixels (~326 ppi) LCD (TFT/TFD)	540 x 960 pixels (~275 ppi) LCD (TFT/TFD)	720 x 1280 pixels (~294 ppi) LCD (TFT/TFD)	240 x 320 pixels (~200 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	60 Hz	60 Hz	?
Battery	800 mAh	1,780 mAh	1,700 mAh	2,200 mAh	810 mAh
Processor	?	1.5 GHz Qualcomm Snapdragon S4 Plus MSM8960	1.2 GHz Qualcomm Snapdragon S4 Plus MSM8960	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)	?
RAM	?	1 GB	1 GB	2 GB	?
Storage	? raw hardware	8 GB	8 GB	16 GB	? raw hardware
Main Camera	Yes	12 megapixel	8 megapixel	8 megapixel	1 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	1080p HD	1080p HD	720p HD	?
Front Camera	-	1 megapixel	Yes	5 megapixel	-
Weight	3 oz (85g)	5.2 oz (147g)	4.66 oz (132g)	4.93 oz (140g)	4.9 oz (139g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	5.27" x 2.56" x 0.38" (134 x 65 x 9.7 mm)	4.82" x 2.4" x 0.46" (122 x 61 x 11.7 mm)	5.78" x 2.79" x 0.33" (147 x 71 x 8.4 mm)	3.9" x 2" x 0.9" (99 x 51 x 22.9 mm)
Form Factor	Clamshell	Slab	Slab	Slab	Clamshell
Platform / OS	(proprietary)	Android	Android	Android	(proprietary)
Network Bands	GSM: 900, 1800, 1900	4G LTE: 25 CDMA: 800, 850, 1900	4G LTE: 13 CDMA: 850, 1900	4G LTE: 2, 4, 5, 12 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900
Data Technology	GPRS	LTE (Cat 3)	LTE (Cat 3)	LTE (Cat 4)	EVDO rA
Features
Flashlight	-	-	-	Yes	Yes
GPS / Location	-	n/a	n/a	n/a	Yes
Ruggedized	-	-	-	-	Yes
Water-Resistant	-	-	-	-	Yes
Accessibility
Adjustable Text Size	-	n/a	n/a	n/a	-
Hearing Aid Compatible	-	Yes	Yes	Yes *	Yes
Multiple Languages	Yes	n/a	n/a	n/a	Yes
TTY/TDD (Digital)	-	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	-	-	-	Yes
Connectivity
Bluetooth	-	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio	Yes Classic Audio
Mobile Hotspot	-	n/a	n/a	n/a	-
NFC	-	Yes	Yes	-	-
USB	-	Yes Micro-USB	Yes Micro-USB	Yes Micro-USB	Yes
Wi-Fi	-	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 a,b,g,n)	Yes 4 (802.11 b,g,n)	-
Contacts
Picture ID	Yes	n/a	n/a	n/a	Yes
Ringer ID	Yes	n/a	n/a	n/a	Yes
Voice Dialing	-	n/a	n/a	n/a	Yes
Customization
Changeable Body Plates	-	-	-	-	Yes
Custom Graphics	Yes	n/a	n/a	n/a	Yes
Custom Ringtones	Yes	n/a	n/a	n/a	Yes
Real-Music Ringers	-	n/a	n/a	n/a	-
Data & Network
Data Tethering	-	n/a	n/a	n/a	Yes
WAP / Web Browser	Yes	n/a	n/a	n/a	Yes
Input
Predictive Text Entry	Yes	n/a	n/a	n/a	Yes
Side Keys	Yes	Yes	Yes	Yes	Yes
Touch Screen	-	Yes	Yes	Yes	-
Memory
Memory Card Slot	-	Yes	Yes	Yes	Yes
Messaging
Email Client	-	n/a	n/a	n/a	-
EMS / Picture Messaging	Yes	n/a	n/a	n/a	Yes
Instant Messaging	-	n/a	n/a	n/a	-
MMS	Yes	n/a	n/a	n/a	Yes
Text Messaging Templates	Yes	n/a	n/a	n/a	Yes
Music
FM Radio	-	-	-	Yes	-
Headphone Jack (3.5mm)	-	Yes	Yes	Yes	-
Music Player	-	n/a	n/a	n/a	Yes
Photo & Video
DLNA	-	-	Yes	Yes	-
Miracast	-	-	-	Yes	-
TV Output	-	-	Yes	-	-
Productivity
Alarm	Yes	n/a	n/a	n/a	Yes
Calculator	Yes	n/a	n/a	n/a	Yes
Calendar	Yes	n/a	n/a	n/a	Yes
To-Do List	Yes	n/a	n/a	n/a	-
Voice Memo	Yes	n/a	n/a	n/a	Yes
Software
BREW	-	n/a	n/a	n/a	Yes
Games	Yes	n/a	n/a	n/a	Yes
Java (J2ME)	Yes	n/a	n/a	n/a	-
Voice
HD Voice	-	Yes	-	Yes	-
Headset Jack (2.5 mm)	Yes	n/a	n/a	n/a	-
Push-To-Talk	-	-	-	-	Yes
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung SGH-X640	ZTE Flash	HTC Droid Incredible 4G LTE	HTC Desire 555	Casio G'zOne Boulder
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	ZTE Flash	HTC Droid Incredible 4G LTE	HTC Desire 555	Casio G'zOne Boulder