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Phone ZTE Z331 Samsung SGH-A127 Samsung Galaxy Ring / Prevail 2 Nubia Red Magic 3 / 3S Motorola i80s
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
? 4" diag.
5 : 3
6.7" diag.
19.5 : 9
?
Display Resolution & Type 176 x 220 pixels
(~117 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (STN)
480 x 800 pixels
(~233 ppi)
LCD (TFT/TFD)
1080 x 2340 pixels
(~388 ppi)
AMOLED
?
Display Refresh ? ? 60 Hz 90 Hz ?
Battery 950 mAh 800 mAh 1,750 mAh 5,000 mAh ?
Processor ? ? 1.4 GHz Qualcomm Snapdragon S2 MSM8655 Qualcomm Snapdragon 855+ ?
RAM ? ? 1 GB 8 GB * ?
Storage ? raw hardware ? raw hardware 4 GB 128 GB * ? raw hardware
Main Camera 3 megapixel Yes 5 megapixel 48 megapixel -
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture QCIF (176 x 144) - 720p HD 4K UHD -
Front Camera - - 1 megapixel 16 megapixel -
Weight 4 oz
(113g)
2.86 oz
(81g)
3.4 oz
(96g)
7.58 oz
(215g)
4 oz
(113g)
Dimensions 3.84" x 2.02" x 0.69"
(98 x 51 x 17.5 mm)
3.39" x 1.67" x 0.76"
(86 x 42 x 19.3 mm)
4.83" x 2.48" x 0.47"
(123 x 63 x 11.9 mm)
6.76" x 3.09" x 0.38"
(172 x 79 x 9.7 mm)
5.4" x 2" x 1"
(137 x 51 x 25.4 mm)
Form Factor Clamshell Clamshell Slab Slab Slab
Platform / OS (proprietary) (proprietary) Android Android (proprietary)
Network Bands

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

GSM: 850, 1900

CDMA: 800, 850, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 30, 34, 38, 39, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8, 19

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

iDEN: 800

Data Technology HSDPA 3.6 GPRS EVDO rA LTE (Cat 9) -
Features 
Fingerprint Reader - - - Yes
stand-alone
-
Flashlight - - - Yes -
GPS / Location Yes - n/a n/a -
Accessibility
Adjustable Text Size - - n/a n/a -
Hearing Aid Compatible Yes
M3, T4 (very tele-coil compatible)
- Yes
M4 (very compatible)
- -
Multiple Languages Yes Yes n/a n/a Yes
TTY/TDD (Digital) Yes Yes Yes Yes Yes
Alerts
Extra Display Yes Yes - - -
Ringer Profiles Yes - - - Yes
Connectivity
Bluetooth Yes - Yes Yes -
USB Yes
Micro-USB
- Yes Yes
USB Type C
-
Wi-Fi - - Yes
4 (802.11 a,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID Yes - n/a n/a -
Ringer ID Yes Yes n/a n/a -
Voice Dialing - - n/a n/a Yes
Customization
Custom Graphics Yes Yes n/a n/a -
Custom Ringtones Yes Yes n/a n/a -
Real-Music Ringers Yes - n/a n/a -
Data & Network
Data Tethering Yes - n/a n/a Yes
Dual-SIM - - - Yes -
WAP / Web Browser Yes Yes n/a n/a Yes
Input
Predictive Text Entry Yes Yes n/a n/a Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes -
Touch Screen - - Yes
Capacitive
Yes
Capacitive
-
Memory
Memory Card Slot Yes - Yes - -
Messaging
Email Client Yes - n/a n/a -
Instant Messaging Yes - n/a n/a -
MMS Yes Yes n/a n/a -
Text Messaging Templates Yes Yes n/a n/a -
Music
Headphone Jack (3.5mm) - - Yes Yes -
Music Player Yes - n/a n/a -
Stereo Speakers - - - Yes -
Photo & Video
DLNA - - Yes - -
TV Output - - - Yes -
Power
Fast Charging - - - Yes -
Productivity
Alarm Yes Yes n/a n/a Yes
Calculator Yes Yes n/a n/a Yes
Calendar Yes Yes n/a n/a Yes
To-Do List - Yes n/a n/a -
Voice Memo Yes Yes n/a n/a Yes
Software
Games Yes Yes n/a n/a Yes
Java (J2ME) Yes Yes n/a n/a Yes
Voice
HD Voice - - - Yes -
Headset Jack (2.5 mm) - - n/a n/a Yes
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  ZTE Z331 Samsung SGH-A127 Samsung Galaxy Ring / Prevail 2 Nubia Red Magic 3 / 3S Motorola i80s
  X > < X > < X > < X > < X

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

 
Phone ZTE Z331 Samsung SGH-A127 Samsung Galaxy Ring / Prevail 2 Nubia Red Magic 3 / 3S Motorola i80s

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