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Phone Samsung SGH-X640 Samsung Galaxy A71 5G T-Mobile REVVL 7 5G
Current U.S. Carriers (none) (none) Metro
T-Mobile
Global Availability Released Released Released
Specifications 
Display Size ? 6.7" diag.
20 : 9
6.6" diag.
20 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1080 x 2400 pixels
(~393 ppi)
AMOLED
1080 x 2408 pixels
(~401 ppi)
LCD (TFT/TFD)
Display Refresh ? 60 Hz 120 Hz
Battery 800 mAh 4,500 mAh 5,000 mAh
Processor ? 2.4 GHz Qualcomm Snapdragon 765 2.2 GHz Snapdragon 6 Gen 1
RAM ? 6 GB 6 GB
Storage ? raw hardware 128 GB 128 GB
Main Camera Yes 64 megapixel 50 megapixel
Wide Camera - 12 megapixel -
Tele Camera - - -
Video Capture - 4K UHD 2K / Quad HD
Front Camera - 32 megapixel 8 megapixel
Weight 3 oz
(85g)
6.52 oz
(185g)
7.27 oz
(206g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
6.39" x 2.97" x 0.31"
(162 x 75 x 7.9 mm)
6.59" x 3.05" x 0.36"
(167 x 77 x 9.1 mm)
Form Factor Clamshell Slab Slab
Platform / OS (proprietary) Android Android
Network Bands

GSM: 900, 1800, 1900

5G: 2, 5, 41, 66, 71, 260, 261

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

WCDMA: 1, 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

5G: 25, 41, 66, 71, 77-A, 77-C

4G LTE: 2, 4, 5, 7, 12, 25, 26, 41, 66, 71

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

Data Technology GPRS NR (5G) NR (5G)
Features 
Barometer - - Yes
Fingerprint Reader - Yes
in-display (optical)
Yes
stand-alone
Flashlight - Yes Yes
Accessibility
Hearing Aid Compatible - Yes
M4, T3 (mostly tele-coil compatible)
Yes
Hearing Aid Compatible (HAC-2019 / M3, T3)
Multiple Languages Yes n/a n/a
TTY/TDD (Digital) - Yes -
Connectivity
Bluetooth - Yes Yes
NFC - Yes Yes
USB - 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)
Contacts
Picture ID Yes n/a n/a
Ringer ID Yes n/a n/a
Customization
Custom Graphics Yes n/a n/a
Custom Ringtones Yes n/a n/a
Data & Network
Dual-SIM - - Yes
WAP / Web Browser Yes n/a n/a
Input
Predictive Text Entry Yes n/a n/a
Side Keys Yes Yes Yes
Touch Screen - Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - Yes Yes
Messaging
EMS / Picture Messaging Yes n/a n/a
MMS Yes n/a n/a
Text Messaging Templates Yes n/a n/a
Music
Headphone Jack (3.5mm) - Yes Yes
Stereo Speakers - - Yes
Power
Fast Charging - Yes Yes
Productivity
Alarm Yes n/a n/a
Calculator Yes n/a n/a
Calendar Yes n/a n/a
To-Do List Yes n/a n/a
Voice Memo Yes n/a n/a
Software
Games Yes n/a n/a
Java (J2ME) Yes n/a n/a
Voice
HD Voice - Yes Yes
Headset Jack (2.5 mm) Yes n/a n/a
Speaker Phone Yes Yes Yes
  Samsung SGH-X640 Samsung Galaxy A71 5G T-Mobile REVVL 7 5G
  X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung Galaxy A71 5G T-Mobile REVVL 7 5G

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