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Phone	Samsung SGH-X640	Samsung Galaxy Ring / Prevail 2	Samsung Glyde U940	LG PM-225	LG K4 / Optimus Zone 3 / Rebel
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	?	4" diag. 5 : 3	2.8" diag. 16.5 : 9	?	4.5" diag. 16 : 9
Display Resolution & Type	128 x 160 pixels LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	240 x 440 pixels (~182 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (STN)	480 x 854 pixels (~218 ppi) LCD (TFT/TFD)
Display Refresh	?	60 Hz	?	?	60 Hz
Battery	800 mAh	1,750 mAh	1,000 mAh	1,000 mAh	1,940 mAh
Processor	?	1.4 GHz Qualcomm Snapdragon S2 MSM8655	?	?	1.1 GHz Qualcomm Snapdragon 210 (MSM8909)
RAM	?	1 GB	?	?	1.5 GB
Storage	? raw hardware	4 GB	? raw hardware	? raw hardware	16 GB *
Main Camera	Yes	5 megapixel	2 megapixel	Yes	5 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	-	720p HD	QVGA (320 x 240)	-	720p HD
Front Camera	-	1 megapixel	-	-	2 megapixel
Weight	3 oz (85g)	3.4 oz (96g)	4.2 oz (119g)	3.35 oz (95g)	3.99 oz (113g)
Dimensions	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.83" x 2.48" x 0.47" (123 x 63 x 11.9 mm)	4.09" x 1.98" x 0.71" (104 x 50 x 18 mm)	3.53" x 1.76" x 0.93" (90 x 45 x 23.6 mm)	5.19" x 2.62" x 0.35" (132 x 67 x 8.9 mm)
Form Factor	Clamshell	Slab	Slide	Clamshell	Slab
Platform / OS	(proprietary)	Android	(proprietary)	(proprietary)	Android
Network Bands	GSM: 900, 1800, 1900	CDMA: 800, 850, 1900	CDMA: 850, 1900	CDMA: 850, 1900 AMPS: 850	4G LTE: 2, 4, 5, 13 WCDMA: 1, 2, 5 CDMA: 850, 1900 GSM: 850, 900, 1800, 1900 *
Data Technology	GPRS	EVDO rA	EVDO r0	1xRTT	LTE (Cat 3)
Features
Flashlight	-	-	-	-	Yes
GPS / Location	-	n/a	Yes	Yes	n/a
Accessibility
Adjustable Text Size	-	n/a	-	-	n/a
Hearing Aid Compatible	-	Yes M4 (very compatible)	Yes M4 (very compatible)	-	Yes M3, T3 (mostly tele-coil compatible)
Multiple Languages	Yes	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	-	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	-	-	Yes	-
Connectivity
Bluetooth	-	Yes	Yes	-	Yes
Mobile Hotspot	-	n/a	-	-	n/a
USB	-	Yes	Yes	Yes	Yes Micro-USB
Wi-Fi	-	Yes 4 (802.11 a,b,g,n)	-	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	Yes	n/a	Yes	Yes	n/a
Ringer ID	Yes	n/a	Yes	Yes	n/a
Voice Dialing	-	n/a	Yes	Yes	n/a
Customization
Custom Graphics	Yes	n/a	Yes	Yes	n/a
Custom Ringtones	Yes	n/a	Yes	Yes	n/a
Real-Music Ringers	-	n/a	Yes	-	n/a
Data & Network
Data Tethering	-	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	Yes
Text Keyboard, Hardware	-	-	Yes	-	-
Touch Screen	-	Yes Capacitive	Yes	-	Yes Capacitive
Memory
Memory Card Slot	-	Yes	Yes	-	Yes
Messaging
Email Client	-	n/a	-	-	n/a
EMS / Picture Messaging	Yes	n/a	-	-	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
Headphone Jack (3.5mm)	-	Yes	-	-	Yes
Music Player	-	n/a	Yes	-	n/a
Photo & Video
DLNA	-	Yes	-	-	-
Miracast	-	-	-	-	Yes
Productivity
Alarm	Yes	n/a	Yes	Yes	n/a
Calculator	Yes	n/a	Yes	Yes	n/a
Calendar	Yes	n/a	Yes	Yes	n/a
To-Do List	Yes	n/a	-	-	n/a
Voice Memo	Yes	n/a	-	Yes	n/a
Software
BREW	-	n/a	Yes	-	n/a
Games	Yes	n/a	Yes	Yes	n/a
Java (J2ME)	Yes	n/a	-	Yes	n/a
Voice
HD Voice	-	-	-	-	Yes *
Headset Jack (2.5 mm)	Yes	n/a	Yes	Yes	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	Samsung SGH-X640	Samsung Galaxy Ring / Prevail 2	Samsung Glyde U940	LG PM-225	LG K4 / Optimus Zone 3 / Rebel
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung SGH-X640	Samsung Galaxy Ring / Prevail 2	Samsung Glyde U940	LG PM-225	LG K4 / Optimus Zone 3 / Rebel