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Phone Samsung Rugby 4 Samsung Galaxy S6 (GSM) Samsung SGH-E640 Samsung Galaxy Note20
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
5.1" diag.
16 : 9
? 6.7" diag.
20 : 9
Display Resolution & Type 240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
1440 x 2560 pixels
(~576 ppi)
AMOLED
176 x 220 pixels
LCD (TFT/TFD)
1080 x 2400 pixels
(~393 ppi)
AMOLED
Display Refresh ? 60 Hz ? 60 Hz
Battery 1,300 mAh 2,550 mAh 800 mAh 4,300 mAh
Processor Intel XMM6230 2.1 GHz Samsung Exynos 7420 ? 3.1 GHz Qualcomm Snapdragon 865+
RAM 128 MB 3 GB ? 8 GB
Storage 256 MB 32 GB * ? raw hardware 128 GB
Main Camera 3 megapixel 16 megapixel 1 megapixel 12 megapixel
Wide Camera - - - 12 megapixel
Tele Camera - - - 64 megapixel
Video Capture QVGA (320 x 240) 4K UHD QCIF (176 x 144) 8K
Front Camera - 5 megapixel - 10 megapixel
Weight 5.22 oz
(148g)
4.87 oz
(138g)
3.17 oz
(90g)
6.84 oz
(194g)
Dimensions 4.25" x 2.17" x 0.85"
(108 x 55 x 21.6 mm)
5.65" x 2.78" x 0.27"
(143 x 71 x 6.8 mm)
3.37" x 1.78" x 0.93"
(86 x 45 x 23.6 mm)
6.36" x 2.96" x 0.33"
(162 x 75 x 8.3 mm)
Form Factor Clamshell Slab Clamshell Slab
Platform / OS (proprietary) Android (proprietary) Android
Network Bands

WCDMA: 1, 2, 5

GSM: 850, 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: 900, 1800, 1900

5G: 2, 5, 12, 25, 41, 66, 71, 260, 261

4G LTE: 2, 4, 5, 7, 12, 13, 14, 25, 26, 29, 30, 38, 41, 46, 48, 66, 71

WCDMA: 2, 4, 5

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

Data Technology HSPA+ 21 LTE (Cat 6) GPRS NR (5G)
Features 
Barometer - - - Yes
Fingerprint Reader - Yes - Yes
in-display (ultrasonic)
Flashlight - Yes - Yes
GPS / Location Yes n/a - n/a
Ruggedized Yes - - -
VR-ready - Yes - -
Water-Resistant Yes
IPX7 (snorkeling)
- - Yes
IPX8 (SCUBA)
Accessibility
Adjustable Text Size Yes n/a - n/a
Hearing Aid Compatible Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
- Yes
M3, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a Yes n/a
TTY/TDD (Digital) Yes Yes - Yes
Alerts
Extra Display Yes - Yes -
Ringer Profiles Yes - - -
Connectivity
Bluetooth Yes Yes Yes Yes
Infrared (IR) - Yes - -
MirrorLink - Yes - -
NFC - Yes - Yes
USB Yes
Micro-USB
Yes
Micro-USB
Yes Yes
USB Type C
Wi-Fi Yes
4 (802.11 b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
- Yes
6 (802.11 a,ac,ax,b,g,n)
Contacts
Picture ID Yes n/a Yes n/a
Ringer ID Yes n/a Yes n/a
Voice Dialing Yes n/a - n/a
Customization
Custom Graphics Yes n/a Yes n/a
Custom Ringtones Yes n/a Yes n/a
Real-Music Ringers Yes n/a Yes n/a
Data & Network
WAP / Web Browser Yes n/a Yes n/a
Input
Predictive Text Entry Yes n/a Yes n/a
Side Keys Yes Yes Yes Yes
Stylus - - - Yes
Touch Screen - Yes
Capacitive
- Yes
Capacitive
Memory
Memory Card Slot Yes - - -
Messaging
Email Client Yes n/a Yes n/a
EMS / Picture Messaging - n/a Yes n/a
MMS Yes n/a Yes n/a
Text Messaging Templates Yes n/a Yes n/a
Music
Headphone Jack (3.5mm) - Yes - -
Music Player Yes n/a Yes n/a
Stereo Speakers - - - Yes
Photo & Video
DLNA - Yes - -
Miracast - Yes - -
TV Output - Yes - Yes
Power
Fast Charging - Yes - Yes
Wireless Charging - Yes - Yes
Productivity
Alarm Yes n/a Yes n/a
Calculator Yes n/a Yes n/a
Calendar Yes n/a Yes n/a
To-Do List Yes n/a Yes n/a
Voice Memo Yes n/a Yes n/a
Software
Games Yes n/a Yes n/a
Java (J2ME) Yes n/a Yes n/a
Voice
HD Voice - Yes - Yes
Push-To-Talk Yes - - -
Speaker Phone Yes Yes Yes Yes
  Samsung Rugby 4 Samsung Galaxy S6 (GSM) Samsung SGH-E640 Samsung Galaxy Note20
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung Rugby 4 Samsung Galaxy S6 (GSM) Samsung SGH-E640 Samsung Galaxy Note20

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