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Phone	Samsung Galaxy Ring / Prevail 2	ZTE Blade Z Max	Samsung SGH-E635 / SGH-E630	Samsung SGH-X640	ZTE Blade X Max
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4" diag. 5 : 3	6" diag. 16 : 9	?	?	6" diag. 16 : 9
Display Resolution & Type	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)	1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	128 x 160 pixels LCD (TFT/TFD)	1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD)
Display Refresh	60 Hz	60 Hz	?	?	60 Hz
Battery	1,750 mAh	4,080 mAh	800 mAh	800 mAh	3,400 mAh
Processor	1.4 GHz Qualcomm Snapdragon S2 MSM8655	1.4 GHz Qualcomm Snapdragon 435 (MSM8940)	?	?	1.4 GHz Qualcomm Snapdragon 435 (MSM8940)
RAM	1 GB	2 GB	?	?	2 GB
Storage	4 GB	32 GB	? raw hardware	? raw hardware	32 GB
Main Camera	5 megapixel	16 megapixel	Yes	Yes	13 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	1080p HD	-	-	1080p HD
Front Camera	1 megapixel	8 megapixel	-	-	5 megapixel
Weight	3.4 oz (96g)	6.58 oz (186g)	2.78 oz (79g)	3 oz (85g)	6.93 oz (196g)
Dimensions	4.83" x 2.48" x 0.47" (123 x 63 x 11.9 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)	3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm)	6.5" x 3.27" x 0.37" (165 x 83 x 9.4 mm)
Form Factor	Slab	Slab	Slide	Clamshell	Slab
Platform / OS	Android	Android	(proprietary)	(proprietary)	Android
Network Bands	CDMA: 800, 850, 1900	4G LTE: 2, 4, 5, 12, 66 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900	GSM: 850, 1800, 1900 *	GSM: 900, 1800, 1900	4G LTE: 2, 4, 5, 12 WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900
Data Technology	EVDO rA	LTE (Cat 6)	GPRS	GPRS	LTE (Cat 4)
Features
Fingerprint Reader	-	Yes stand-alone	-	-	Yes stand-alone
Flashlight	-	Yes	-	-	Yes
GPS / Location	n/a	n/a	-	-	n/a
Accessibility
Adjustable Text Size	n/a	n/a	-	-	n/a
Hearing Aid Compatible	Yes M4 (very compatible)	Yes M4, T3 (mostly tele-coil compatible)	-	-	Yes M4, T3 (mostly tele-coil compatible)
Multiple Languages	n/a	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	Yes	Yes	-	-	Yes
Connectivity
Bluetooth	Yes	Yes	-	-	Yes
Infrared (IR)	-	-	Yes	-	-
USB	Yes	Yes USB Type C	-	-	Yes USB Type C
Wi-Fi	Yes 4 (802.11 a,b,g,n)	Yes 4 (802.11 b,g,n)	-	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	n/a	n/a	Yes	Yes	n/a
Ringer ID	n/a	n/a	Yes	Yes	n/a
Voice Dialing	n/a	n/a	-	-	n/a
Customization
Custom Graphics	n/a	n/a	Yes	Yes	n/a
Custom Ringtones	n/a	n/a	Yes	Yes	n/a
Real-Music Ringers	n/a	n/a	-	-	n/a
Data & Network
Data Tethering	n/a	n/a	Yes	-	n/a
WAP / Web Browser	n/a	n/a	Yes	Yes	n/a
Input
Predictive Text Entry	n/a	n/a	Yes	Yes	n/a
Side Keys	Yes	Yes	Yes	Yes	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	n/a	n/a	Yes	Yes	n/a
Instant Messaging	n/a	n/a	-	-	n/a
MMS	n/a	n/a	Yes	Yes	n/a
Text Messaging Templates	n/a	n/a	Yes	Yes	n/a
Music
FM Radio	-	Yes	-	-	-
Headphone Jack (3.5mm)	Yes	Yes	-	-	Yes
Music Player	n/a	n/a	-	-	n/a
Photo & Video
DLNA	Yes	-	-	-	-
Power
Fast Charging	-	Yes	-	-	Yes
Productivity
Alarm	n/a	n/a	Yes	Yes	n/a
Calculator	n/a	n/a	Yes	Yes	n/a
Calendar	n/a	n/a	Yes	Yes	n/a
To-Do List	n/a	n/a	Yes	Yes	n/a
Voice Memo	n/a	n/a	Yes	Yes	n/a
Software
Games	n/a	n/a	Yes	Yes	n/a
Java (J2ME)	n/a	n/a	Yes	Yes	n/a
Voice
HD Voice	-	Yes	-	-	-
Headset Jack (2.5 mm)	n/a	n/a	-	Yes	n/a
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	Samsung Galaxy Ring / Prevail 2	ZTE Blade Z Max	Samsung SGH-E635 / SGH-E630	Samsung SGH-X640	ZTE Blade X Max
	X >	< X >	< X >	< X >	< X

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


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