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Phone Samsung Galaxy Ring / Prevail 2 Samsung SGH-X640 ZTE Blade Z Max Samsung SGH-E635 / SGH-E630 Samsung Glyde U940
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 4" diag.
5 : 3
? 6" diag.
16 : 9
? 2.8" diag.
16.5 : 9
Display Resolution & Type 480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
1080 x 1920 pixels
(~367 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
240 x 440 pixels
(~182 ppi)
LCD (TFT/TFD)
Display Refresh 60 Hz ? 60 Hz ? ?
Battery 1,750 mAh 800 mAh 4,080 mAh 800 mAh 1,000 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 32 GB ? raw hardware ? raw hardware
Main Camera 5 megapixel Yes 16 megapixel Yes 2 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture 720p HD - 1080p HD - QVGA (320 x 240)
Front Camera 1 megapixel - 8 megapixel - -
Weight 3.4 oz
(96g)
3 oz
(85g)
6.58 oz
(186g)
2.78 oz
(79g)
4.2 oz
(119g)
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)
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)
4.09" x 1.98" x 0.71"
(104 x 50 x 18 mm)
Form Factor Slab Clamshell Slab Slide Slide
Platform / OS Android (proprietary) Android (proprietary) (proprietary)
Network Bands

CDMA: 800, 850, 1900

GSM: 900, 1800, 1900

4G LTE: 2, 4, 5, 12, 66

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

GSM: 850, 1800, 1900

*

CDMA: 850, 1900

Data Technology EVDO rA GPRS LTE (Cat 6) GPRS EVDO r0
Features 
Fingerprint Reader - - Yes
stand-alone
- -
Flashlight - - Yes - -
GPS / Location n/a - n/a - Yes
Accessibility
Adjustable Text Size n/a - n/a - -
Hearing Aid Compatible Yes
M4 (very compatible)
- Yes
M4, T3 (mostly tele-coil compatible)
- Yes
M4 (very compatible)
Multiple Languages n/a Yes n/a Yes Yes
TTY/TDD (Digital) Yes - Yes - Yes
Connectivity
Bluetooth Yes - Yes - Yes
Infrared (IR) - - - Yes -
USB Yes - Yes
USB Type C
- Yes
Wi-Fi Yes
4 (802.11 a,b,g,n)
- Yes
4 (802.11 b,g,n)
- -
Contacts
Picture ID n/a Yes n/a Yes Yes
Ringer ID n/a Yes n/a Yes Yes
Voice Dialing n/a - n/a - Yes
Customization
Custom Graphics n/a Yes n/a Yes Yes
Custom Ringtones n/a Yes n/a Yes Yes
Real-Music Ringers n/a - n/a - Yes
Data & Network
Data Tethering n/a - n/a Yes Yes
WAP / Web Browser n/a Yes n/a Yes Yes
Input
Predictive Text Entry n/a Yes n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - - - Yes
Touch Screen Yes
Capacitive
- Yes
Capacitive
- Yes
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 n/a Yes Yes
Text Messaging Templates n/a Yes n/a Yes Yes
Music
FM Radio - - Yes - -
Headphone Jack (3.5mm) Yes - Yes - -
Music Player n/a - n/a - Yes
Photo & Video
DLNA Yes - - - -
Power
Fast Charging - - Yes - -
Productivity
Alarm n/a Yes n/a Yes Yes
Calculator n/a Yes n/a Yes Yes
Calendar n/a Yes n/a Yes Yes
To-Do List n/a Yes n/a Yes -
Voice Memo n/a Yes n/a Yes -
Software
BREW n/a - n/a - Yes
Games n/a Yes n/a Yes Yes
Java (J2ME) n/a Yes n/a Yes -
Voice
HD Voice - - Yes - -
Headset Jack (2.5 mm) n/a Yes n/a - Yes
Speaker Phone Yes Yes Yes Yes Yes
  Samsung Galaxy Ring / Prevail 2 Samsung SGH-X640 ZTE Blade Z Max Samsung SGH-E635 / SGH-E630 Samsung Glyde U940
  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 ZTE Blade Z Max Samsung SGH-E635 / SGH-E630 Samsung Glyde U940

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