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Phone	Samsung Galaxy Ring / Prevail 2	Samsung SGH-X640	Samsung Glyde U940	ZTE Blade Z Max	Samsung SGH-E635 / SGH-E630
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	6" diag. 16 : 9	?
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	240 x 440 pixels (~182 ppi) LCD (TFT/TFD)	1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)
Display Refresh	60 Hz	?	?	60 Hz	?
Battery	1,750 mAh	800 mAh	1,000 mAh	4,080 mAh	800 mAh
Processor	1.4 GHz Qualcomm Snapdragon S2 MSM8655	?	?	1.4 GHz Qualcomm Snapdragon 435 (MSM8940)	?
RAM	1 GB	?	?	2 GB	?
Storage	4 GB	? raw hardware	? raw hardware	32 GB	? raw hardware
Main Camera	5 megapixel	Yes	2 megapixel	16 megapixel	Yes
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	-	QVGA (320 x 240)	1080p HD	-
Front Camera	1 megapixel	-	-	8 megapixel	-
Weight	3.4 oz (96g)	3 oz (85g)	4.2 oz (119g)	6.58 oz (186g)	2.78 oz (79g)
Dimensions	4.83" x 2.48" x 0.47" (123 x 63 x 11.9 mm)	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	4.09" x 1.98" x 0.71" (104 x 50 x 18 mm)	6.51" x 3.28" x 0.33" (165 x 83 x 8.3 mm)	3.34" x 1.69" x 0.85" (85 x 43 x 21.6 mm)
Form Factor	Slab	Clamshell	Slide	Slab	Slide
Platform / OS	Android	(proprietary)	(proprietary)	Android	(proprietary)
Network Bands	CDMA: 800, 850, 1900	GSM: 900, 1800, 1900	CDMA: 850, 1900	4G LTE: 2, 4, 5, 12, 66 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	GSM: 850, 1800, 1900 *
Data Technology	EVDO rA	GPRS	EVDO r0	LTE (Cat 6)	GPRS
Features
Fingerprint Reader	-	-	-	Yes stand-alone	-
Flashlight	-	-	-	Yes	-
GPS / Location	n/a	-	Yes	n/a	-
Accessibility
Adjustable Text Size	n/a	-	-	n/a	-
Hearing Aid Compatible	Yes M4 (very compatible)	-	Yes M4 (very compatible)	Yes M4, T3 (mostly tele-coil compatible)	-
Multiple Languages	n/a	Yes	Yes	n/a	Yes
TTY/TDD (Digital)	Yes	-	Yes	Yes	-
Connectivity
Bluetooth	Yes	-	Yes	Yes	-
Infrared (IR)	-	-	-	-	Yes
USB	Yes	-	Yes	Yes USB Type C	-
Wi-Fi	Yes 4 (802.11 a,b,g,n)	-	-	Yes 4 (802.11 b,g,n)	-
Contacts
Picture ID	n/a	Yes	Yes	n/a	Yes
Ringer ID	n/a	Yes	Yes	n/a	Yes
Voice Dialing	n/a	-	Yes	n/a	-
Customization
Custom Graphics	n/a	Yes	Yes	n/a	Yes
Custom Ringtones	n/a	Yes	Yes	n/a	Yes
Real-Music Ringers	n/a	-	Yes	n/a	-
Data & Network
Data Tethering	n/a	-	Yes	n/a	Yes
WAP / Web Browser	n/a	Yes	Yes	n/a	Yes
Input
Predictive Text Entry	n/a	Yes	Yes	n/a	Yes
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	n/a	Yes	-	n/a	Yes
Instant Messaging	n/a	-	-	n/a	-
MMS	n/a	Yes	Yes	n/a	Yes
Text Messaging Templates	n/a	Yes	Yes	n/a	Yes
Music
FM Radio	-	-	-	Yes	-
Headphone Jack (3.5mm)	Yes	-	-	Yes	-
Music Player	n/a	-	Yes	n/a	-
Photo & Video
DLNA	Yes	-	-	-	-
Power
Fast Charging	-	-	-	Yes	-
Productivity
Alarm	n/a	Yes	Yes	n/a	Yes
Calculator	n/a	Yes	Yes	n/a	Yes
Calendar	n/a	Yes	Yes	n/a	Yes
To-Do List	n/a	Yes	-	n/a	Yes
Voice Memo	n/a	Yes	-	n/a	Yes
Software
BREW	n/a	-	Yes	n/a	-
Games	n/a	Yes	Yes	n/a	Yes
Java (J2ME)	n/a	Yes	-	n/a	Yes
Voice
HD Voice	-	-	-	Yes	-
Headset Jack (2.5 mm)	n/a	Yes	Yes	n/a	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Samsung Galaxy Ring / Prevail 2	Samsung SGH-X640	Samsung Glyde U940	ZTE Blade Z Max	Samsung SGH-E635 / SGH-E630
	X >	< X >	< X >	< X >	< X

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


Phone	Samsung Galaxy Ring / Prevail 2	Samsung SGH-X640	Samsung Glyde U940	ZTE Blade Z Max	Samsung SGH-E635 / SGH-E630