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Phone Samsung SGH-X640 AT&T Cingular Flip IV / Cricket Debut Flip Samsung Galaxy S6 (GSM)
Current U.S. Carriers (none) (none) (none)
Global Availability Released Released Released
Specifications 
Display Size ? 2.8" diag.
4 : 3
5.1" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
(~143 ppi)
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
Display Refresh ? ? 60 Hz
Battery 800 mAh 1,450 mAh 2,550 mAh
Processor ? 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) 2.1 GHz Samsung Exynos 7420
RAM ? 512 MB 3 GB
Storage ? raw hardware 4 GB 32 GB *
Main Camera Yes 2 megapixel 16 megapixel
Wide Camera - - -
Tele Camera - - -
Video Capture - WVGA / 480p 4K UHD
Front Camera - - 5 megapixel
Weight 3 oz
(85g)
4.59 oz
(130g)
4.87 oz
(138g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
4.13" x 2.14" x 0.74"
(105 x 54 x 18.9 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
Form Factor Clamshell Clamshell Slab
Platform / OS (proprietary) (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 2, 4, 5, 12, 14

WCDMA: 2, 4, 5

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

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

Data Technology GPRS LTE (Cat 4) LTE (Cat 6)
Features 
Fingerprint Reader - - Yes
Flashlight - - Yes
GPS / Location - Yes n/a
VR-ready - - Yes
Accessibility
Adjustable Text Size - Yes n/a
Hearing Aid Compatible - Yes
M4, T4 (very tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes Yes n/a
TTY/TDD (Digital) - Yes Yes
Alerts
Extra Display - Yes -
Connectivity
Bluetooth - Yes Yes
Infrared (IR) - - Yes
MirrorLink - - Yes
Mobile Hotspot - Yes n/a
NFC - - Yes
USB - Yes
Micro-USB
Yes
Micro-USB
Wi-Fi - Yes
4 (802.11 b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Contacts
Picture ID Yes Yes n/a
Ringer ID Yes - n/a
Voice Dialing - Yes n/a
Customization
Custom Graphics Yes Yes n/a
Custom Ringtones Yes Yes n/a
Real-Music Ringers - Yes n/a
Data & Network
WAP / Web Browser Yes Yes n/a
Input
Predictive Text Entry Yes Yes n/a
Side Keys Yes Yes Yes
Touch Screen - - Yes
Capacitive
Memory
Memory Card Slot - Yes -
Messaging
Email Client - Yes n/a
EMS / Picture Messaging Yes - n/a
MMS Yes Yes n/a
Text Messaging Templates Yes - n/a
Music
FM Radio - Yes -
Headphone Jack (3.5mm) - Yes Yes
Music Player - Yes n/a
Photo & Video
DLNA - - Yes
Miracast - - Yes
TV Output - - Yes
Power
Fast Charging - - Yes
Wireless Charging - - Yes
Productivity
Alarm Yes Yes n/a
Calculator Yes Yes n/a
Calendar Yes Yes n/a
To-Do List Yes - n/a
Voice Memo Yes Yes n/a
Software
Games Yes Yes n/a
Java (J2ME) Yes - n/a
Voice
HD Voice - Yes Yes
Headset Jack (2.5 mm) Yes - n/a
Speaker Phone Yes Yes Yes
  Samsung SGH-X640 AT&T Cingular Flip IV / Cricket Debut Flip Samsung Galaxy S6 (GSM)
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Phone Samsung SGH-X640 AT&T Cingular Flip IV / Cricket Debut Flip Samsung Galaxy S6 (GSM)

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