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Specifications
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Phone	Samsung SGH-X640	Huawei W1	Kyocera Marbl / K132 / Velvet	BLU Vivo XL	Motorola Backflip
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	4" diag. 5 : 3	?	5.5" diag. 16 : 9	3.1" diag. 5 : 3
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	128 x 128 pixels LCD (STN)	720 x 1280 pixels (~267 ppi) AMOLED	320 x 480 pixels (~186 ppi) LCD (TFT/TFD)
Display Refresh	?	?	?	60 Hz	60 Hz
Battery	800 mAh	1,950 mAh	900 mAh	3,150 mAh	1,400 mAh
Processor	?	1.2 GHz Qualcomm Snapdragon 400 MSM8230	?	1.3 GHz MediaTek 6753	528 MHz Qualcomm MSM7201a
RAM	?	512 MB	?	2 GB	?
Storage	? raw hardware	4 GB	? raw hardware	16 GB	? raw hardware
Main Camera	Yes	5 megapixel	-	13 megapixel	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	720p HD	-	1080p HD	CIF (352 x 288)
Front Camera	-	Yes	-	5 megapixel	-
Weight	3 oz (85g)	4.41 oz (125g)	2.96 oz (84g)	5.36 oz (152g)	4.7 oz (133g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.84" x 2.5" x 0.41" (123 x 64 x 10.4 mm)	3.39" x 1.73" x 0.83" (86 x 44 x 21.1 mm)	6.11" x 3.02" x 0.3" (155 x 77 x 7.5 mm)	4.25" x 2.09" x 0.6" (108 x 53 x 15.3 mm)
Form Factor	Clamshell	Slab	Clamshell	Slab	Clamshell
Platform / OS	(proprietary)	Windows	(proprietary)	Android	Android
Network Bands	GSM: 900, 1800, 1900	WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900	4G LTE: 2, 4, 7, 12, 17 WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900
Data Technology	GPRS	HSPA+ 21	1xRTT	LTE (Cat 4)	HSPA 7.2
Features
Flashlight	-	-	-	Yes	-
GPS / Location	-	n/a	Yes	n/a	n/a
Accessibility
Adjustable Text Size	-	n/a	-	n/a	n/a
Hearing Aid Compatible	-	Yes M3 (mostly compatible)	Yes M3, T4 (very tele-coil compatible)	-	Yes M3 (mostly compatible)
Multiple Languages	Yes	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	-	-	Yes	Yes	-
Connectivity
Bluetooth	-	Yes	-	Yes	Yes
Mobile Hotspot	-	n/a	-	n/a	n/a
USB	-	Yes Micro-USB	-	Yes USB Type C	Yes Micro-USB
Wi-Fi	-	Yes 4 (802.11 b,g,n)	-	Yes 4 (802.11 b,g,n)	Yes 802.11 b,g
Contacts
Picture ID	Yes	n/a	-	n/a	n/a
Ringer ID	Yes	n/a	-	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	-	n/a	n/a
Data & Network
Data Tethering	-	n/a	-	n/a	n/a
Dual-SIM	-	-	-	Yes	-
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
Touch Screen	-	Yes Capacitive	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	-	Yes	-	Yes	Yes
Messaging
Email Client	-	n/a	-	n/a	n/a
EMS / Picture Messaging	Yes	n/a	Yes	n/a	n/a
Instant Messaging	-	n/a	-	n/a	n/a
MMS	Yes	n/a	-	n/a	n/a
Text Messaging Templates	Yes	n/a	-	n/a	n/a
Music
FM Radio	-	-	-	Yes	-
Headphone Jack (3.5mm)	-	Yes	-	Yes	Yes
Music Player	-	n/a	-	n/a	n/a
Power
Fast Charging	-	-	-	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	Yes	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	Yes *	n/a	n/a
Voice
Headset Jack (2.5 mm)	Yes	n/a	Yes	n/a	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung SGH-X640	Huawei W1	Kyocera Marbl / K132 / Velvet	BLU Vivo XL	Motorola Backflip
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	Huawei W1	Kyocera Marbl / K132 / Velvet	BLU Vivo XL	Motorola Backflip