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Phone Samsung SPH-A640 Sony Xperia Z2 Ericsson T66 Siemens SL55 Samsung Galaxy S6 (GSM)
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Not yet released Released Released Released
Specifications 
Display Size ? 5.2" diag.
16 : 9
? ? 5.1" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1080 x 1920 pixels
(~424 ppi)
LCD (TFT/TFD)
? 101 x 80 pixels
LCD (STN)
1440 x 2560 pixels
(~576 ppi)
AMOLED
Display Refresh ? 60 Hz ? ? 60 Hz
Battery 800 mAh 3,200 mAh ? 500 mAh 2,550 mAh
Processor ? 2.3 GHz Qualcomm Snapdragon 801 MSM8974AB ? ? 2.1 GHz Samsung Exynos 7420
RAM ? 3 GB ? ? 3 GB
Storage ? raw hardware 16 GB ? raw hardware ? raw hardware 32 GB *
Main Camera Yes 20 megapixel - - 16 megapixel
Wide Camera - - - - -
Tele Camera - - - - -
Video Capture - 4K UHD - - 4K UHD
Front Camera - 2 megapixel - - 5 megapixel
Weight 3.2 oz
(91g)
5.75 oz
(163g)
2.08 oz
(59g)
2.79 oz
(79g)
4.87 oz
(138g)
Dimensions 3.6" x 1.8" x 0.9"
(91 x 46 x 22.9 mm)
5.78" x 2.89" x 0.32"
(147 x 73 x 8.2 mm)
3.62" x 1.61" x 0.69"
(92 x 41 x 17.5 mm)
3.21" x 1.75" x 0.86"
(82 x 44 x 21.8 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
Form Factor Clamshell Slab Slab Slide Slab
Platform / OS (proprietary) Android (proprietary) (proprietary) Android
Network Bands

CDMA: 850, 1900

AMPS: 850

4G LTE: 1, 2, 3, 4, 5, 7, 8, 13, 17

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

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

*

Data Technology 1xRTT LTE (Cat 4) - GPRS LTE (Cat 6)
Features 
Fingerprint Reader - - - - Yes
Flashlight - - - - Yes
GPS / Location Yes n/a - - n/a
Ruggedized - Yes - - -
VR-ready - - - - Yes
Water-Resistant - Yes
IPX8 (SCUBA)
- - -
Accessibility
Adjustable Text Size - n/a - - n/a
Hearing Aid Compatible Yes - - - Yes
Multiple Languages Yes n/a Yes Yes n/a
TTY/TDD (Digital) Yes Yes - - Yes
Alerts
Extra Display Yes - - - -
Ringer Profiles - - Yes Yes -
Connectivity
Bluetooth Yes Yes - - Yes
Infrared (IR) - - - Yes Yes
MirrorLink - - - - Yes
Mobile Hotspot - n/a - - n/a
NFC - Yes - - Yes
USB Yes Yes
Micro-USB
- - Yes
Micro-USB
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
- - Yes
5 (802.11 a,ac,b,g,n)
Contacts
Picture ID Yes n/a - Yes n/a
Ringer ID Yes n/a - Yes n/a
Voice Dialing Yes n/a - Yes n/a
Customization
Custom Graphics Yes n/a Yes Yes n/a
Custom Ringtones Yes n/a Yes Yes n/a
Real-Music Ringers - n/a - - n/a
Data & Network
Data Tethering Yes n/a - Yes n/a
WAP / Web Browser Yes n/a Yes Yes n/a
Input
Predictive Text Entry Yes n/a Yes Yes n/a
Side Keys Yes Yes Yes Yes Yes
Touch Screen - Yes - - Yes
Memory
Memory Card Slot - Yes - - -
Messaging
Email Client - n/a - Yes n/a
EMS / Picture Messaging - n/a Yes Yes n/a
Instant Messaging - n/a - - n/a
MMS - n/a - Yes n/a
Text Messaging Templates Yes n/a Yes Yes n/a
Music
FM Radio - Yes - - -
Headphone Jack (3.5mm) - Yes - - Yes
Music Player - n/a - - n/a
Photo & Video
DLNA - Yes - - Yes
Miracast - Yes - - Yes
TV Output - Yes - - Yes
Power
Fast Charging - - - - Yes
Wireless Charging - - - - Yes
Productivity
Alarm Yes n/a Yes Yes n/a
Calculator Yes n/a Yes Yes n/a
Calendar Yes n/a Yes Yes n/a
To-Do List Yes n/a Yes Yes n/a
Voice Memo Yes n/a - Yes n/a
Software
Games Yes n/a Yes Yes n/a
Java (J2ME) Yes n/a - Yes n/a
Voice
HD Voice - - - - Yes
Headset Jack (2.5 mm) Yes n/a - - n/a
Push-To-Talk Yes - - - -
Speaker Phone Yes Yes - Yes Yes
  Samsung SPH-A640 Sony Xperia Z2 Ericsson T66 Siemens SL55 Samsung Galaxy S6 (GSM)
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung SPH-A640 Sony Xperia Z2 Ericsson T66 Siemens SL55 Samsung Galaxy S6 (GSM)

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