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Phone Samsung SGH-X640 Samsung Galaxy S6 (GSM) Samsung Galaxy J2 / J2 Pure / J2 Dash Coolpad Snap ZTE F160
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 5.1" diag.
16 : 9
5" diag.
16 : 9
2.8" diag.
4 : 3
2.4" diag.
4 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
540 x 960 pixels
(~220 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~143 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz ? ?
Battery 800 mAh 2,550 mAh 2,600 mAh 1,390 mAh 900 mAh
Processor ? 2.1 GHz Samsung Exynos 7420 1.4 GHz Samsung Exynos 7570 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) ?
RAM ? 3 GB 2 GB 512 MB ?
Storage ? raw hardware 32 GB * 16 GB 4 GB ? raw hardware
Main Camera Yes 16 megapixel 8 megapixel 2 megapixel 3 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - 4K UHD 1080p HD CIF (352 x 288) QCIF (176 x 144)
Front Camera - 5 megapixel 5 megapixel - -
Weight 3 oz
(85g)
4.87 oz
(138g)
5.43 oz
(154g)
4.16 oz
(118g)
2.96 oz
(84g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
5.65" x 2.84" x 0.35"
(144 x 72 x 8.9 mm)
4.29" x 2.17" x 0.74"
(109 x 55 x 18.8 mm)
4.57" x 1.93" x 0.44"
(116 x 49 x 11.2 mm)
Form Factor Clamshell Slab Slab Clamshell Slab
Platform / OS (proprietary) Android Android (proprietary) (proprietary)
Network Bands

GSM: 900, 1800, 1900

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, 14, 66, 71

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

4G LTE: 2, 4, 5, 12, 13, 25, 26, 41, 66, 71

WCDMA: 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

Data Technology GPRS LTE (Cat 6) LTE (Cat 4) LTE (Cat 4) HSDPA 3.6
Features 
Fingerprint Reader - Yes - - -
Flashlight - Yes Yes - -
GPS / Location - n/a n/a Yes Yes
VR-ready - Yes - - -
Accessibility
Adjustable Text Size - n/a n/a Yes -
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T4 (very tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a n/a Yes Yes
TTY/TDD (Digital) - Yes Yes Yes Yes
Alerts
Extra Display - - - Yes -
Ringer Profiles - - - - Yes
Connectivity
Bluetooth - Yes Yes Yes Yes
Infrared (IR) - Yes - - -
MirrorLink - Yes - - -
Mobile Hotspot - n/a n/a Yes -
NFC - Yes - - -
USB - Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID Yes n/a n/a Yes -
Ringer ID Yes n/a n/a Yes Yes
Customization
Custom Graphics Yes n/a n/a Yes Yes
Custom Ringtones Yes n/a n/a - Yes
Real-Music Ringers - n/a n/a Yes Yes
Data & Network
WAP / Web Browser Yes n/a n/a Yes Yes
Input
Predictive Text Entry Yes n/a n/a Yes Yes
Side Keys Yes Yes Yes Yes Yes
Touch Screen - Yes
Capacitive
Yes
Capacitive
- -
Memory
Memory Card Slot - - Yes Yes Yes
Messaging
EMS / Picture Messaging Yes n/a n/a - -
Instant Messaging - n/a n/a - Yes
MMS Yes n/a n/a Yes Yes
Text Messaging Templates Yes n/a n/a Yes Yes
Music
FM Radio - - - Yes -
Headphone Jack (3.5mm) - Yes Yes Yes Yes
Music Player - n/a n/a Yes Yes
Photo & Video
DLNA - Yes - - -
Miracast - Yes - - -
TV Output - Yes - - -
Power
Fast Charging - Yes - - -
Wireless Charging - Yes - - -
Productivity
Alarm Yes n/a n/a Yes Yes
Calculator Yes n/a n/a Yes Yes
Calendar Yes n/a n/a Yes Yes
To-Do List Yes n/a n/a - -
Voice Memo Yes n/a n/a Yes Yes
Software
Games Yes n/a n/a - Yes
Java (J2ME) Yes n/a n/a - Yes
Voice
HD Voice - Yes - Yes -
Headset Jack (2.5 mm) Yes n/a n/a - -
Speaker Phone Yes Yes Yes Yes Yes
  Samsung SGH-X640 Samsung Galaxy S6 (GSM) Samsung Galaxy J2 / J2 Pure / J2 Dash Coolpad Snap ZTE F160
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SGH-X640 Samsung Galaxy S6 (GSM) Samsung Galaxy J2 / J2 Pure / J2 Dash Coolpad Snap ZTE F160

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