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Phone Samsung SGH-X640 Samsung Galaxy S9+ Nubia Red Magic 3 / 3S Kyocera DuraXV / DuraXV Plus / DuraXA Sharp Aquos Crystal
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 6.2" diag.
18.5 : 9
6.7" diag.
19.5 : 9
2.4" diag.
4 : 3
5" diag.
16 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2960 pixels
(~531 ppi)
AMOLED
1080 x 2340 pixels
(~388 ppi)
AMOLED
240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~294 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 90 Hz ? 60 Hz
Battery 800 mAh 3,500 mAh 5,000 mAh 1,500 mAh 2,040 mAh
Processor ? 2.8 GHz Qualcomm Snapdragon 845 Qualcomm Snapdragon 855+ Qualcomm QSC6185 1.2 GHz Qualcomm Snapdragon 400 MSM8926
RAM ? 6 GB 8 GB * 256 MB 1.5 GB
Storage ? raw hardware 64 GB 128 GB * 512 MB 8 GB
Main Camera Yes 12 megapixel 48 megapixel 5 megapixel 8 megapixel
Wide Camera - - - - -
Tele Camera - 12 megapixel - - -
Video Capture - 4K UHD 4K UHD QVGA (320 x 240) 1080p HD
Front Camera - 8 megapixel 16 megapixel - 1 megapixel
Weight 3 oz
(85g)
6.67 oz
(189g)
7.58 oz
(215g)
5.6 oz
(159g)
4.97 oz
(141g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
6.22" x 2.91" x 0.33"
(158 x 74 x 8.5 mm)
6.76" x 3.09" x 0.38"
(172 x 79 x 9.7 mm)
4.13" x 2.15" x 0.98"
(105 x 55 x 24.9 mm)
5.16" x 2.6" x 0.4"
(131 x 66 x 10.2 mm)
Form Factor Clamshell Slab Slab Clamshell Slab
Platform / OS (proprietary) Android Android (proprietary) Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 66, 71

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, 17, 18, 19, 20, 25, 26, 28, 30, 34, 38, 39, 40, 41, 66

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

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

*

4G LTE: 25, 26, 41

CDMA: 800, 850, 1900

Data Technology GPRS LTE (Cat 18) LTE (Cat 9) EVDO rA LTE (Cat 4)
Features 
Barometer - Yes - - -
Fingerprint Reader - Yes
stand-alone
Yes
stand-alone
- -
Flashlight - Yes Yes Yes -
GPS / Location - n/a n/a Yes n/a
Ruggedized - - - Yes -
VR-ready - Yes - - -
Water-Resistant - Yes
IPX8 (SCUBA)
- Yes
IPX8 (SCUBA)
-
Accessibility
Adjustable Text Size - n/a n/a Yes n/a
Hearing Aid Compatible - Yes - Yes
M4, T4 (very tele-coil compatible)
Yes
M4, T4 (very tele-coil compatible)
Multiple Languages Yes n/a n/a Yes n/a
TTY/TDD (Digital) - Yes Yes Yes Yes
Alerts
Extra Display - - - Yes -
Connectivity
Bluetooth - Yes Yes Yes Yes
MirrorLink - Yes - - -
Mobile Hotspot - n/a n/a - n/a
NFC - Yes - - -
USB - Yes
USB Type C
Yes
USB Type C
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)
- Yes
4 (802.11 b,g,n)
Contacts
Picture ID Yes n/a n/a Yes n/a
Ringer ID Yes n/a n/a Yes n/a
Voice Dialing - n/a n/a Yes n/a
Customization
Custom Graphics Yes n/a n/a Yes n/a
Custom Ringtones Yes n/a n/a Yes n/a
Real-Music Ringers - n/a n/a Yes n/a
Data & Network
Data Tethering - n/a n/a - n/a
Dual-SIM - - Yes - -
WAP / Web Browser Yes n/a n/a Yes n/a
Input
Predictive Text Entry Yes n/a n/a Yes n/a
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - Yes - -
Touch Screen - Yes
Capacitive
Yes
Capacitive
- Yes
Capacitive
Memory
Memory Card Slot - Yes - Yes Yes
Messaging
Email Client - n/a n/a - n/a
EMS / Picture Messaging Yes n/a n/a - n/a
Instant Messaging - n/a n/a - n/a
MMS Yes n/a n/a Yes n/a
Text Messaging Templates Yes n/a n/a Yes n/a
Music
FM Radio - Yes * - - -
Headphone Jack (3.5mm) - Yes Yes Yes Yes
Music Player - n/a n/a Yes n/a
Stereo Speakers - Yes Yes - -
Photo & Video
Miracast - - - - Yes
TV Output - Yes Yes - -
Power
Fast Charging - Yes Yes - -
Wireless Charging - Yes - - -
Productivity
Alarm Yes n/a n/a Yes n/a
Calculator Yes n/a n/a Yes n/a
Calendar Yes n/a n/a Yes n/a
To-Do List Yes n/a n/a - n/a
Voice Memo Yes n/a n/a Yes n/a
Software
BREW - n/a n/a Yes n/a
Games Yes n/a n/a Yes 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
Push-To-Talk - - - Yes * -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung SGH-X640 Samsung Galaxy S9+ Nubia Red Magic 3 / 3S Kyocera DuraXV / DuraXV Plus / DuraXA Sharp Aquos Crystal
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung Galaxy S9+ Nubia Red Magic 3 / 3S Kyocera DuraXV / DuraXV Plus / DuraXA Sharp Aquos Crystal

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