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Phone Ericsson T66 Samsung SGH-X640 Samsung Galaxy S6 (GSM) Siemens A56 / A56i
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? ? 5.1" diag.
16 : 9
?
Display Resolution & Type ? 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
101 x 64 pixels
Display Refresh ? ? 60 Hz ?
Battery ? 800 mAh 2,550 mAh 700 mAh
Processor ? ? 2.1 GHz Samsung Exynos 7420 ?
RAM ? ? 3 GB ?
Storage ? raw hardware ? raw hardware 32 GB * ? raw hardware
Main Camera - Yes 16 megapixel -
Wide Camera - - - -
Tele Camera - - - -
Video Capture - - 4K UHD -
Front Camera - - 5 megapixel -
Weight 2.08 oz
(59g)
3 oz
(85g)
4.87 oz
(138g)
3 oz
(85g)
Dimensions 3.62" x 1.61" x 0.69"
(92 x 41 x 17.5 mm)
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)
4" x 1.7" x 0.8"
(102 x 43 x 20.3 mm)
Form Factor Slab Clamshell Slab Slab
Platform / OS (proprietary) (proprietary) Android (proprietary)
Network Bands

GSM: 900, 1800, 1900

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

*

GSM: 850, 1900

Data Technology - GPRS LTE (Cat 6) -
Features 
Fingerprint Reader - - Yes -
Flashlight - - Yes -
GPS / Location - - n/a Yes
VR-ready - - Yes -
Accessibility
Hearing Aid Compatible - - Yes
M3, T3 (mostly tele-coil compatible)
-
Multiple Languages Yes Yes n/a -
TTY/TDD (Digital) - - Yes Yes
Alerts
Ringer Profiles Yes - - Yes
Connectivity
Bluetooth - - Yes -
Infrared (IR) - - Yes -
MirrorLink - - Yes -
NFC - - Yes -
USB - - Yes
Micro-USB
-
Wi-Fi - - Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID - Yes n/a Yes
Ringer ID - Yes n/a Yes
Customization
Changeable Body Plates - - - Yes
Custom Graphics Yes Yes n/a Yes
Custom Ringtones Yes Yes n/a Yes
Data & Network
WAP / Web Browser Yes Yes n/a Yes
Input
Predictive Text Entry Yes Yes n/a Yes
Side Keys Yes Yes Yes -
Touch Screen - - Yes
Capacitive
-
Messaging
EMS / Picture Messaging Yes Yes n/a Yes
MMS - Yes n/a -
Text Messaging Templates Yes Yes n/a -
Music
Headphone Jack (3.5mm) - - Yes -
Photo & Video
DLNA - - Yes -
Miracast - - Yes -
TV Output - - Yes -
Power
Fast Charging - - Yes -
Wireless Charging - - Yes -
Productivity
Alarm Yes Yes n/a Yes
Calculator Yes Yes n/a Yes
Calendar Yes Yes n/a -
To-Do List Yes Yes n/a -
Voice Memo - Yes n/a -
Software
Games Yes Yes n/a Yes
Java (J2ME) - Yes n/a -
Voice
HD Voice - - Yes -
Headset Jack (2.5 mm) - Yes n/a -
Speaker Phone - Yes Yes -
  Ericsson T66 Samsung SGH-X640 Samsung Galaxy S6 (GSM) Siemens A56 / A56i
  X > < X > < X > < X

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

 
Phone Ericsson T66 Samsung SGH-X640 Samsung Galaxy S6 (GSM) Siemens A56 / A56i

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