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Phone Samsung SGH-X640 Samsung SCH-A990 Asus ROG Phone II ZTE Blade Vantage
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Not yet released Released
Specifications 
Display Size ? ? 6.6" diag.
19.5 : 9
5" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
240 x 320 pixels
LCD (TFT/TFD)
1080 x 2340 pixels
(~391 ppi)
AMOLED
480 x 854 pixels
(~196 ppi)
LCD (TFT/TFD)
Display Refresh ? ? 120 Hz 60 Hz
Battery 800 mAh 1,000 mAh 6,000 mAh 2,500 mAh
Processor ? ? 3 GHz Qualcomm Snapdragon 855 Plus 1.1 GHz Qualcomm Snapdragon 210 (MSM8909)
RAM ? ? 12 GB 2 GB
Storage ? raw hardware ? raw hardware 512 GB 16 GB
Main Camera Yes 3 megapixel 48 megapixel 8 megapixel
Wide Camera - - 13 megapixel -
Tele Camera - - - -
Video Capture - ? 4K UHD 720p HD
Front Camera - - 24 megapixel 2 megapixel
Weight 3 oz
(85g)
4.4 oz
(125g)
8.47 oz
(240g)
5.29 oz
(150g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
3.8" x 1.88" x 0.82"
(97 x 48 x 20.8 mm)
6.73" x 3.06" x 0.37"
(171 x 78 x 9.5 mm)
5.73" x 2.85" x 0.36"
(146 x 72 x 9.2 mm)
Form Factor Clamshell Clamshell Slab Slab
Platform / OS (proprietary) (proprietary) Android Android
Network Bands

GSM: 900, 1800, 1900

CDMA: 850, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 26, 28, 29, 32, 34, 38, 39, 40, 41, 46, 66

WCDMA: 1, 2, 3, 4, 5, 8, 19

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 13

Data Technology GPRS EVDO r0 LTE (Cat 20) LTE (Cat 4)
Features 
Fingerprint Reader - - Yes
in-display (optical)
-
Flashlight - Yes Yes Yes
GPS / Location - Yes n/a n/a
Accessibility
Hearing Aid Compatible - Yes
M3 (mostly compatible)
Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Multiple Languages Yes Yes n/a n/a
TTY/TDD (Digital) - Yes - Yes
Alerts
Extra Display - Yes - -
Connectivity
Bluetooth - Yes Yes Yes
NFC - - Yes -
USB - Yes Yes
USB Type C
Yes
Micro-USB
Wi-Fi - - Yes
5 (802.11 a,ac,b,g,n)
Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes Yes n/a n/a
Ringer ID Yes Yes n/a n/a
Voice Dialing - Yes n/a n/a
Customization
Custom Graphics Yes Yes n/a n/a
Custom Ringtones Yes Yes n/a n/a
Real-Music Ringers - Yes n/a n/a
Data & Network
Data Tethering - Yes n/a n/a
Dual-SIM - - Yes -
WAP / Web Browser Yes Yes n/a n/a
Input
Predictive Text Entry Yes Yes n/a n/a
Side Keys Yes Yes Yes Yes
Touch Screen - - Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - Yes - Yes
Messaging
EMS / Picture Messaging Yes Yes n/a n/a
MMS Yes Yes n/a n/a
Text Messaging Templates Yes Yes n/a n/a
Music
FM Radio - - Yes -
Headphone Jack (3.5mm) - - Yes Yes
Music Player - Yes n/a n/a
Stereo Speakers - Yes Yes -
Photo & Video
TV Output - Yes Yes -
Power
Fast Charging - - Yes -
Productivity
Alarm Yes Yes n/a n/a
Calculator Yes Yes n/a n/a
Calendar Yes Yes n/a n/a
To-Do List Yes - n/a n/a
Voice Memo Yes Yes n/a n/a
Software
BREW - Yes n/a n/a
Games Yes Yes n/a n/a
Java (J2ME) Yes - n/a n/a
Voice
HD Voice - - - Yes
Headset Jack (2.5 mm) Yes - n/a n/a
Speaker Phone Yes Yes Yes Yes
  Samsung SGH-X640 Samsung SCH-A990 Asus ROG Phone II ZTE Blade Vantage
  X > < X > < X > < X

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Phone Samsung SGH-X640 Samsung SCH-A990 Asus ROG Phone II ZTE Blade Vantage

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