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Phone Samsung Galaxy S21 Kyocera DuraForce HTC Shadow LG G Flex (U.S. GSM) Samsung Messager III / R570
Current U.S. Carriers Verizon (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 6.2" diag.
20 : 9
4.5" diag.
16 : 9
2.6" diag.
4 : 3
6" diag.
16 : 9
2.4" diag.
4 : 3
Display Resolution & Type 1080 x 2400 pixels
(~424 ppi)
AMOLED
720 x 1280 pixels
(~326 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~154 ppi)
LCD (TFT/TFD)
720 x 1280 pixels
(~245 ppi)
AMOLED
240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
Display Refresh 120 Hz 60 Hz ? 60 Hz ?
Battery 4,000 mAh 3,100 mAh 920 mAh 3,500 mAh 1,140 mAh
Processor 2.8 GHz Qualcomm Snapdragon 888 1.4 GHz Qualcomm Snapdragon 400 (MSM8928) 200 MHz OMAP 850 2.3 GHz Qualcomm Snapdragon 800 ?
RAM 8 GB 2 GB ? 2 GB ?
Storage 128 GB * 16 GB ? raw hardware 32 GB ? raw hardware
Main Camera 12 megapixel 8 megapixel 2 megapixel 13 megapixel 1 megapixel
Wide Camera 12 megapixel - - - -
Tele Camera 64 megapixel - - - -
Video Capture 8K 1080p HD ? 4K UHD -
Front Camera 10 megapixel 2 megapixel - 2 megapixel -
Weight 6.03 oz
(171g)
7.06 oz
(200g)
5.29 oz
(150g)
6.24 oz
(177g)
3.7 oz
(105g)
Dimensions 5.97" x 2.8" x 0.31"
(152 x 71 x 7.9 mm)
5.39" x 2.78" x 0.55"
(137 x 71 x 14 mm)
4.06" x 2.09" x 0.59"
(103 x 53 x 15 mm)
6.32" x 3.21" x 0.31"
(160 x 82 x 8 mm)
4.59" x 2.11" x 0.59"
(117 x 53 x 15 mm)
Form Factor Slab Slab Slide Slab Slide
Platform / OS Android Android Windows Mobile Standard Android (proprietary)
Network Bands

5G: 2, 5, 12, 25, 30, 41, 66, 71, 77-C, 260, 261

4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 48, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

4G LTE: 1, 2, 4, 5, 7, 17

WCDMA: 1, 2, 5, 8

GSM: 850, 900, 1800, 1900

*

GSM: 850, 900, 1800, 1900

4G LTE: 2, 4, 5, 7, 17

WCDMA: 2, 4, 5

GSM: 850, 900, 1800, 1900

*

CDMA: 850, 1700, 1900

Data Technology NR (5G) LTE (Cat 3) EDGE LTE (Cat 4) 1xRTT
Features 
Barometer Yes - - - -
Fingerprint Reader Yes
in-display (ultrasonic)
- - - -
Flashlight Yes Yes - Yes -
GPS / Location n/a n/a n/a n/a Yes
Ruggedized - Yes - - -
Water-Resistant Yes
IPX8 (SCUBA)
Yes
IPX8 (SCUBA)
- - -
Accessibility
Adjustable Text Size n/a n/a n/a n/a -
Hearing Aid Compatible Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
- Yes
M3, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages n/a n/a n/a n/a Yes
TTY/TDD (Digital) Yes Yes - Yes Yes
Alerts
Ringer Profiles - - Yes - -
Connectivity
Bluetooth Yes Yes Yes Yes Yes
Infrared (IR) - - - Yes -
Mobile Hotspot n/a n/a n/a n/a -
NFC Yes Yes - Yes -
USB Yes
USB Type C
Yes
Micro-USB
Yes
Mini-USB
Yes
Micro-USB
Yes
Wi-Fi Yes
6 (802.11 a,ac,ax,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
Yes
802.11 b,g
Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID n/a n/a n/a n/a Yes
Ringer ID n/a n/a n/a n/a Yes
Voice Dialing n/a n/a n/a n/a Yes
Customization
Custom Graphics n/a n/a n/a n/a Yes
Custom Ringtones n/a n/a n/a n/a Yes
Real-Music Ringers n/a n/a n/a n/a Yes
Data & Network
Data Tethering n/a n/a n/a n/a -
WAP / Web Browser n/a n/a n/a n/a Yes
Input
Predictive Text Entry n/a n/a n/a n/a Yes
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware - - Yes - 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 n/a -
Instant Messaging n/a n/a n/a n/a -
MMS n/a n/a n/a n/a Yes
Text Messaging Templates n/a n/a n/a n/a Yes
Music
Headphone Jack (3.5mm) - Yes - Yes Yes
Music Player n/a n/a n/a n/a Yes
Stereo Speakers Yes Yes - - -
Photo & Video
DLNA - Yes - Yes -
Miracast - Yes - Yes -
TV Output Yes - - Yes -
Power
Fast Charging Yes - - - -
Wireless Charging Yes Yes - - -
Productivity
Alarm n/a n/a n/a n/a Yes
Calculator n/a n/a n/a n/a Yes
Calendar n/a n/a n/a n/a Yes
To-Do List n/a n/a n/a n/a -
Voice Memo n/a n/a n/a n/a Yes
Software
BREW n/a n/a n/a n/a Yes
Games n/a n/a n/a n/a Yes
Java (J2ME) n/a n/a n/a n/a -
Voice
HD Voice Yes - - Yes * -
Push-To-Talk - Yes * - - -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Samsung Galaxy S21 Kyocera DuraForce HTC Shadow LG G Flex (U.S. GSM) Samsung Messager III / R570
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung Galaxy S21 Kyocera DuraForce HTC Shadow LG G Flex (U.S. GSM) Samsung Messager III / R570

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