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Phone Samsung Galaxy S6 (GSM) Motorola Moto z4 AT&T Vista Samsung SGH-E640 Samsung SGH-A127
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 5.1" diag.
16 : 9
6.4" diag.
19.5 : 9
5.5" diag.
18 : 9
? ?
Display Resolution & Type 1440 x 2560 pixels
(~576 ppi)
AMOLED
1080 x 2340 pixels
(~403 ppi)
AMOLED
720 x 1440 pixels
(~293 ppi)
LCD (TFT/TFD)
176 x 220 pixels
LCD (TFT/TFD)
128 x 160 pixels
LCD (STN)
Display Refresh 60 Hz 60 Hz 60 Hz ? ?
Battery 2,550 mAh 3,600 mAh 2,450 mAh 800 mAh 800 mAh
Processor 2.1 GHz Samsung Exynos 7420 2 GHz Qualcomm Snapdragon 675 2 GHz MediaTek Helio A22 (MT6761V) ? ?
RAM 3 GB 4 GB 3 GB ? ?
Storage 32 GB * 128 GB 32 GB ? raw hardware ? raw hardware
Main Camera 16 megapixel 48 megapixel 8 megapixel 1 megapixel Yes
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture 4K UHD 4K UHD 1080p HD QCIF (176 x 144) -
Front Camera 5 megapixel 25 megapixel 5 megapixel - -
Weight 4.87 oz
(138g)
6 oz
(170g)
5.51 oz
(156g)
3.17 oz
(90g)
2.86 oz
(81g)
Dimensions 5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
6.22" x 2.96" x 0.29"
(158 x 75 x 7.4 mm)
5.88" x 2.82" x 0.35"
(149 x 72 x 8.9 mm)
3.37" x 1.78" x 0.93"
(86 x 45 x 23.6 mm)
3.39" x 1.67" x 0.76"
(86 x 42 x 19.3 mm)
Form Factor Slab Slab Slab Clamshell Clamshell
Platform / OS Android Android Android (proprietary) (proprietary)
Network Bands

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 29, 30

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

4G LTE: 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 28, 29, 30, 38, 41, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30

WCDMA: 1, 2, 4, 5, 8

GSM: 900, 1800, 1900

GSM: 850, 1900

Data Technology LTE (Cat 6) LTE (Cat 12) LTE (Cat 4) GPRS GPRS
Features 
Fingerprint Reader Yes Yes - - -
Flashlight Yes Yes Yes - -
VR-ready Yes - - - -
Water-Resistant - Yes - - -
Accessibility
Hearing Aid Compatible Yes Yes Yes - -
Multiple Languages n/a n/a n/a Yes Yes
TTY/TDD (Digital) Yes Yes - - Yes
Alerts
Extra Display - - - Yes Yes
Connectivity
Bluetooth Yes Yes Yes Yes -
Infrared (IR) Yes - - - -
MirrorLink Yes - - - -
NFC Yes Yes - - -
USB Yes
Micro-USB
Yes
USB Type C
Yes
USB Type C
Yes -
Wi-Fi Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes - -
Contacts
Picture ID n/a n/a n/a Yes -
Ringer ID n/a n/a n/a Yes Yes
Customization
Custom Graphics n/a n/a n/a Yes Yes
Custom Ringtones n/a n/a n/a Yes Yes
Real-Music Ringers n/a n/a n/a Yes -
Data & Network
WAP / Web Browser n/a n/a n/a Yes Yes
Input
Predictive Text Entry n/a n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Touch Screen Yes Yes Yes - -
Memory
Memory Card Slot - Yes Yes - -
Messaging
Email Client n/a n/a n/a Yes -
EMS / Picture Messaging n/a n/a n/a Yes -
MMS n/a n/a n/a Yes Yes
Text Messaging Templates n/a n/a n/a Yes Yes
Music
FM Radio - Yes - - -
Headphone Jack (3.5mm) Yes Yes Yes - -
Music Player n/a n/a n/a Yes -
Photo & Video
DLNA Yes - - - -
Miracast Yes - - - -
TV Output Yes - - - -
Power
Fast Charging Yes Yes - - -
Wireless Charging Yes - - - -
Productivity
Alarm n/a n/a n/a Yes Yes
Calculator n/a n/a n/a Yes Yes
Calendar n/a n/a n/a Yes Yes
To-Do List n/a n/a n/a Yes Yes
Voice Memo n/a n/a n/a Yes Yes
Software
Games n/a n/a n/a Yes Yes
Java (J2ME) n/a n/a n/a Yes Yes
Voice
HD Voice Yes Yes Yes - -
Speaker Phone Yes Yes Yes Yes Yes
  Samsung Galaxy S6 (GSM) Motorola Moto z4 AT&T Vista Samsung SGH-E640 Samsung SGH-A127
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung Galaxy S6 (GSM) Motorola Moto z4 AT&T Vista Samsung SGH-E640 Samsung SGH-A127

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