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Phone Samsung SGH-X640 Sony Xperia XZ1 ZTE Blade Max 2s BlackBerry Key2
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size ? 5.2" diag.
16 : 9
6" diag.
18 : 9
4.5" diag.
5 : 3
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1080 x 1920 pixels
(~424 ppi)
LCD (TFT/TFD)
1080 x 2160 pixels
(~402 ppi)
LCD (TFT/TFD)
1080 x 1620 pixels
(~433 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 60 Hz 60 Hz
Battery 800 mAh 2,700 mAh 4,000 mAh 3,500 mAh
Processor ? 2.5 GHz Qualcomm Snapdragon 835 (MSM8998) 1.4 GHz Qualcomm Snapdragon 435 (MSM8940) 2.2 GHz Qualcomm Snapdragon 660
RAM ? 4 GB 2 GB 6 GB
Storage ? raw hardware 64 GB 32 GB 64 GB *
Main Camera Yes 19 megapixel 13 megapixel 12 megapixel
Wide Camera - - - -
Tele Camera - - - 12 megapixel
Video Capture - 4K UHD 1080p HD 4K UHD
Front Camera - 13 megapixel 5 megapixel 8 megapixel
Weight 3 oz
(85g)
5.5 oz
(156g)
6.35 oz
(180g)
5.93 oz
(168g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.82" x 2.89" x 0.29"
(148 x 73 x 7.4 mm)
6.26" x 2.96" x 0.32"
(159 x 75 x 8.1 mm)
5.96" x 2.82" x 0.33"
(151 x 72 x 8.4 mm)
Form Factor Clamshell Slab Slab Slab
Platform / OS (proprietary) Android Android Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 29, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

4G LTE: 2, 3, 4, 5, 7, 12, 13, 25, 26, 41

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 20, 28, 29, 30, 38, 40, 41, 66

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

Data Technology GPRS LTE (Cat 16) LTE (Cat 6) LTE (Cat 11)
Features 
Barometer - Yes - -
Fingerprint Reader - Yes *
stand-alone
Yes
stand-alone
Yes
stand-alone
Flashlight - Yes Yes Yes
Water-Resistant - Yes
IPX8 (SCUBA)
- -
Accessibility
Hearing Aid Compatible - Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a n/a n/a
TTY/TDD (Digital) - Yes Yes Yes
Connectivity
Bluetooth - Yes Yes Yes
NFC - Yes - Yes
USB - Yes
USB Type C
Yes
USB Type C
Yes
USB Type C
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Contacts
Picture ID Yes n/a n/a n/a
Ringer ID Yes n/a n/a n/a
Customization
Custom Graphics Yes n/a n/a n/a
Custom Ringtones Yes n/a n/a n/a
Data & Network
Dual-SIM - Yes * - -
WAP / Web Browser Yes n/a n/a n/a
Input
Predictive Text Entry Yes n/a n/a n/a
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - - - Yes
Touch Screen - Yes
Capacitive
Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - Yes Yes Yes
Messaging
EMS / Picture Messaging Yes n/a n/a n/a
MMS Yes n/a n/a n/a
Text Messaging Templates Yes n/a n/a n/a
Music
FM Radio - - - Yes
Headphone Jack (3.5mm) - Yes Yes Yes
Stereo Speakers - Yes - -
Photo & Video
DLNA - Yes - -
Miracast - Yes - -
TV Output - - - Yes
Power
Fast Charging - Yes Yes Yes
Productivity
Alarm Yes n/a n/a n/a
Calculator Yes n/a n/a n/a
Calendar Yes n/a n/a n/a
To-Do List Yes n/a n/a n/a
Voice Memo Yes n/a n/a n/a
Software
Games Yes n/a n/a n/a
Java (J2ME) Yes n/a n/a n/a
Voice
HD Voice - Yes Yes Yes
Headset Jack (2.5 mm) Yes n/a n/a n/a
Speaker Phone Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Sony Xperia XZ1 ZTE Blade Max 2s BlackBerry Key2
  X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Sony Xperia XZ1 ZTE Blade Max 2s BlackBerry Key2

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