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Phone Samsung SGH-X640 Samsung Galaxy S6 (GSM) Motorola V551 / V330 / V547 / V555 / V557 LG Optimus L90 Samsung Galaxy Z Flip6
Current U.S. Carriers (none) (none) (none) (none) AT&T
Boost
Consumer Cellular
Spectrum Mobile
T-Mobile
US Cellular
Verizon
Xfinity Mobile
Global Availability Released Released Released Released Released
Specifications 
Display Size ? 5.1" diag.
16 : 9
? 4.7" diag.
16 : 9
6.7" diag.
22 : 9
Display Resolution & Type 128 x 160 pixels
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
176 x 220 pixels
LCD (TFT/TFD)
540 x 960 pixels
(~234 ppi)
LCD (TFT/TFD)
1080 x 2640 pixels
(~426 ppi)
AMOLED
Display Refresh ? 60 Hz ? 60 Hz 120 Hz
Battery 800 mAh 2,550 mAh 820 mAh 2,460 mAh 4,000 mAh
Processor ? 2.1 GHz Samsung Exynos 7420 ? 1.2 GHz Qualcomm Snapdragon 400 MSM8226 3.4 GHz Snapdragon 8 Gen 3 for Galaxy
RAM ? 3 GB ? 1 GB 12 GB
Storage ? raw hardware 32 GB * ? raw hardware 8 GB 256 GB *
Main Camera Yes 16 megapixel Yes 5 megapixel 50 megapixel
Wide Camera - - - - 12 megapixel
Tele Camera - - - - -
Video Capture - 4K UHD ? 1080p HD 4K UHD
Front Camera - 5 megapixel - Yes 10 megapixel
Weight 3 oz
(85g)
4.87 oz
(138g)
4.23 oz
(120g)
4.37 oz
(124g)
6.6 oz
(187g)
Dimensions 3.43" x 1.81" x 0.91"
(87 x 46 x 23.1 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
3.5" x 1.93" x 0.97"
(89 x 49 x 24.6 mm)
5.18" x 2.6" x 0.38"
(132 x 66 x 9.7 mm)
3.35" x 2.83" x 0.59"
(85 x 72 x 14.9 mm)
Form Factor Clamshell Slab Clamshell Slab Foldable
Platform / OS (proprietary) Android (proprietary) Android Android
Network Bands

GSM: 900, 1800, 1900

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 29, 30

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

*

GSM: 850, 900, 1800, 1900

*

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

5G: 1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 30, 38, 41, 48, 66, 70, 71, 77-A, 77-C, 78, 257, 258, 260, 261

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 48, 66, 71

WCDMA: 1, 2, 4, 5, 8

GSM: 850, 900, 1800, 1900

Data Technology GPRS LTE (Cat 6) EDGE HSPA+ 21 NR (5G)
Features 
Barometer - - - - Yes
Fingerprint Reader - Yes - - Yes
stand-alone
Flashlight - Yes - Yes Yes
GPS / Location - n/a - n/a n/a
VR-ready - Yes - - -
Water-Resistant - - - - Yes
IPX8 (SCUBA)
Accessibility
Adjustable Text Size - n/a - n/a n/a
Hearing Aid Compatible - Yes
M3, T3 (mostly tele-coil compatible)
- Yes
M3, T4 (very tele-coil compatible)
Yes
Hearing Aid Compatible (HAC-2019 / M3, T3)
Multiple Languages Yes n/a Yes n/a n/a
TTY/TDD (Digital) - Yes Yes Yes Yes
Alerts
Extra Display - - Yes - Yes
Ringer Profiles - - Yes - -
Connectivity
Bluetooth - Yes Yes Yes Yes
Infrared (IR) - Yes - Yes -
MirrorLink - Yes - - -
Mobile Hotspot - n/a - n/a n/a
NFC - Yes - - Yes
USB - Yes
Micro-USB
Yes Yes Yes
USB Type C
Wi-Fi - Yes
5 (802.11 a,ac,b,g,n)
- Yes
4 (802.11 b,g,n)
Yes
6E (802.11 a,ac,ax,b,g,n)
Contacts
Picture ID Yes n/a Yes n/a n/a
Ringer ID Yes n/a Yes n/a n/a
Voice Dialing - n/a Yes n/a n/a
Customization
Custom Graphics Yes n/a Yes n/a n/a
Custom Ringtones Yes n/a Yes n/a n/a
Real-Music Ringers - n/a Yes n/a n/a
Data & Network
Data Tethering - n/a Yes n/a n/a
Dual-SIM - - - - Yes
WAP / Web Browser Yes n/a Yes n/a n/a
Input
Predictive Text Entry Yes n/a Yes n/a n/a
Side Keys Yes Yes Yes Yes Yes
Touch Screen - Yes
Capacitive
- Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot - - - Yes -
Messaging
Email Client - n/a Yes n/a n/a
EMS / Picture Messaging Yes n/a Yes n/a n/a
Instant Messaging - n/a Yes n/a n/a
MMS Yes n/a Yes n/a n/a
Text Messaging Templates Yes n/a Yes n/a n/a
Music
Headphone Jack (3.5mm) - Yes - Yes -
Music Player - n/a - n/a n/a
Photo & Video
DLNA - Yes - - -
Miracast - Yes - - -
TV Output - Yes - - -
Power
Fast Charging - Yes - - Yes
Wireless Charging - Yes - - Yes
Productivity
Alarm Yes n/a Yes n/a n/a
Calculator Yes n/a Yes n/a n/a
Calendar Yes n/a Yes n/a n/a
To-Do List Yes n/a - n/a n/a
Voice Memo Yes n/a Yes n/a n/a
Software
Games Yes n/a Yes n/a n/a
Java (J2ME) Yes n/a Yes n/a n/a
Voice
HD Voice - Yes - - Yes
Headset Jack (2.5 mm) Yes n/a Yes n/a n/a
Speaker Phone Yes Yes Yes Yes Yes
  Samsung SGH-X640 Samsung Galaxy S6 (GSM) Motorola V551 / V330 / V547 / V555 / V557 LG Optimus L90 Samsung Galaxy Z Flip6
  X > < X > < X > < X > < X

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

 
Phone Samsung SGH-X640 Samsung Galaxy S6 (GSM) Motorola V551 / V330 / V547 / V555 / V557 LG Optimus L90 Samsung Galaxy Z Flip6

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