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Phone Samsung SGH-X640 Samsung Galaxy S6 (GSM) Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo Alcatel Go Flip / MyFlip Samsung SGH-P850 / P858
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 5.1" diag.
16 : 9
5.5" diag.
16 : 9
2.8" diag.
4 : 3
?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
720 x 1280 pixels
(~267 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~143 ppi)
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz ? ?
Battery 800 mAh 2,550 mAh 3,300 mAh 1,350 mAh 950 mAh
Processor ? 2.1 GHz Samsung Exynos 7420 1.6 GHz Samsung Exynos 7870 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 720p HD ?
Front Camera - 5 megapixel Yes - -
Weight 3 oz
(85g)
4.87 oz
(138g)
5.8 oz
(164g)
4.1 oz
(116g)
4.23 oz
(120g)
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)
5.96" x 3.01" x 0.34"
(151 x 76 x 8.6 mm)
4.13" x 2.08" x 0.74"
(105 x 53 x 18.7 mm)
3.77" x 1.86" x 0.96"
(96 x 47 x 24.4 mm)
Form Factor Clamshell Slab Slab Clamshell Clamshell
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

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

4G LTE: 25, 26, 41

WCDMA: 1, 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

GSM: 900, 1800, 1900

Data Technology GPRS LTE (Cat 6) LTE (Cat 6) LTE (Cat 4) EDGE
Features 
Fingerprint Reader - Yes - - -
Flashlight - Yes Yes - -
GPS / Location - n/a n/a 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
M4, T4 (very tele-coil compatible)
-
Multiple Languages Yes 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 - - -
Mobile Hotspot - n/a n/a Yes -
NFC - Yes - - -
USB - Yes
Micro-USB
Yes
Micro-USB
Yes
Micro-USB
Yes
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
-
Contacts
Picture ID Yes n/a n/a Yes 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 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
Email Client - n/a n/a Yes Yes
EMS / Picture Messaging Yes n/a n/a - -
MMS Yes n/a n/a Yes Yes
Text Messaging Templates Yes n/a n/a - Yes
Music
FM Radio - - Yes Yes -
Headphone Jack (3.5mm) - Yes Yes Yes -
Music Player - n/a n/a Yes Yes
Stereo Speakers - - - - Yes
Photo & Video
DLNA - Yes - - -
Miracast - Yes - - -
TV Output - Yes - - 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
Software
Games Yes n/a n/a - Yes
Java (J2ME) Yes n/a n/a - Yes
Voice
HD Voice - Yes 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 J7 (2017, GSM) / J7 Prime / Halo Alcatel Go Flip / MyFlip Samsung SGH-P850 / P858
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung Galaxy S6 (GSM) Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo Alcatel Go Flip / MyFlip Samsung SGH-P850 / P858

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