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Phone Samsung SGH-X640 Samsung Galaxy S9+ Nubia Red Magic 3 / 3S Samsung Repp Samsung SPH/SCH-N300
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
3.2" diag.
5 : 3
?
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2960 pixels
(~531 ppi)
AMOLED
1080 x 2340 pixels
(~388 ppi)
AMOLED
320 x 480 pixels
(~180 ppi)
LCD (TFT/TFD)
128 x 64 pixels
Display Refresh ? 60 Hz 90 Hz 60 Hz ?
Battery 800 mAh 3,500 mAh 5,000 mAh 1,500 mAh ?
Processor ? 2.8 GHz Qualcomm Snapdragon 845 Qualcomm Snapdragon 855+ ? ?
RAM ? 6 GB 8 GB * ? ?
Storage ? raw hardware 64 GB 128 GB * ? raw hardware ? raw hardware
Main Camera Yes 12 megapixel 48 megapixel 3 megapixel -
Wide Camera - - - - -
Tele Camera - 12 megapixel - - -
Video Capture - 4K UHD 4K UHD ? -
Front Camera - 8 megapixel 16 megapixel - -
Weight 3 oz
(85g)
6.67 oz
(189g)
7.58 oz
(215g)
3.72 oz
(105g)
4.1 oz
(116g)
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)
4.35" x 2.26" x 0.48"
(110 x 57 x 12.2 mm)
4.5" x 1.9" x 0.9"
(114 x 48 x 22.9 mm)
Form Factor Clamshell Slab Slab Slab Flip
Platform / OS (proprietary) Android Android Android (proprietary)
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

CDMA: 850, 1900

AMPS: 850

Data Technology GPRS LTE (Cat 18) LTE (Cat 9) EVDO r0 -
Features 
Barometer - Yes - - -
Fingerprint Reader - Yes
stand-alone
Yes
stand-alone
- -
Flashlight - Yes Yes - -
GPS / Location - n/a n/a n/a Yes
VR-ready - Yes - - -
Water-Resistant - Yes
IPX8 (SCUBA)
- - -
Accessibility
Hearing Aid Compatible - Yes - Yes
M3 (mostly compatible)
-
Multiple Languages Yes n/a n/a n/a -
TTY/TDD (Digital) - Yes Yes Yes -
Connectivity
Bluetooth - Yes Yes Yes -
MirrorLink - Yes - - -
NFC - Yes - - -
USB - Yes
USB Type C
Yes
USB Type C
Yes
Micro-USB
-
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes -
Contacts
Picture ID Yes n/a n/a n/a -
Ringer ID Yes n/a n/a n/a -
Voice Dialing - n/a n/a n/a Yes
Customization
Custom Graphics Yes n/a n/a n/a -
Custom Ringtones Yes n/a n/a n/a -
Real-Music Ringers - n/a n/a n/a -
Data & Network
Data Tethering - n/a n/a n/a Yes
Dual-SIM - - Yes - -
WAP / Web Browser Yes n/a n/a n/a Yes
Input
Predictive Text Entry Yes n/a n/a n/a Yes
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 -
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 n/a -
Text Messaging Templates Yes n/a n/a n/a -
Music
FM Radio - Yes * - - -
Headphone Jack (3.5mm) - Yes Yes Yes -
Music Player - n/a n/a n/a -
Stereo Speakers - Yes Yes - -
Photo & Video
TV Output - Yes Yes - -
Power
Fast Charging - Yes Yes - -
Wireless Charging - Yes - - -
Productivity
Alarm Yes n/a n/a n/a Yes
Calculator Yes n/a n/a n/a Yes
Calendar Yes n/a n/a n/a Yes
To-Do List Yes n/a n/a n/a Yes
Voice Memo Yes n/a n/a n/a -
Software
Games Yes n/a n/a n/a Yes
Java (J2ME) Yes n/a n/a n/a -
Voice
HD Voice - Yes Yes - -
Headset Jack (2.5 mm) Yes n/a n/a n/a Yes
Speaker Phone Yes Yes Yes Yes -
  * Some versions only
  Samsung SGH-X640 Samsung Galaxy S9+ Nubia Red Magic 3 / 3S Samsung Repp Samsung SPH/SCH-N300
  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 Samsung Repp Samsung SPH/SCH-N300

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