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Phone Pantech Matrix Pro C820 Audiovox CDM-8920 / PM8920 Samsung Galaxy S21 Google Pixel 3a XL Sanyo MM-8300
Current U.S. Carriers (none) (none) Verizon (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.4" diag.
4 : 3
? 6.2" diag.
20 : 9
6" diag.
18 : 9
?
Display Resolution & Type 240 x 320 pixels
(~167 ppi)
LCD (TFT/TFD)
128 x 160 pixels
LCD (TFT/TFD)
1080 x 2400 pixels
(~424 ppi)
AMOLED
1080 x 2160 pixels
(~402 ppi)
AMOLED
176 x 220 pixels
LCD (TFT/TFD)
Display Refresh ? ? 120 Hz 60 Hz ?
Battery 1,320 mAh ? 4,000 mAh 3,700 mAh 1,000 mAh
Processor 528 MHz ARM 11 ? 2.8 GHz Qualcomm Snapdragon 888 2 GHz Qualcomm Snapdragon 670 ?
RAM ? ? 8 GB 4 GB ?
Storage ? raw hardware ? raw hardware 128 GB * 64 GB ? raw hardware
Main Camera 2 megapixel 1 megapixel 12 megapixel 12 megapixel Yes
Wide Camera - - 12 megapixel - -
Tele Camera - - 64 megapixel - -
Video Capture QCIF (176 x 144) - 8K 4K UHD QCIF (176 x 144)
Front Camera - - 10 megapixel 8 megapixel -
Weight 5.34 oz
(151g)
3.88 oz
(110g)
6.03 oz
(171g)
5.89 oz
(167g)
3.6 oz
(102g)
Dimensions 4.2" x 2" x 0.9"
(107 x 51 x 22.9 mm)
3.4" x 1.85" x 0.9"
(86 x 47 x 22.9 mm)
5.97" x 2.8" x 0.31"
(152 x 71 x 7.9 mm)
6.3" x 3" x 0.3"
(160 x 76 x 7.6 mm)
3.35" x 1.85" x 0.97"
(85 x 47 x 24.6 mm)
Form Factor Slide Clamshell Slab Slab Clamshell
Platform / OS Windows Mobile Standard (proprietary) Android Android (proprietary)
Network Bands

WCDMA: 1, 2, 5

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

AMPS: 850

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, 3, 4, 5, 7, 8, 12, 13, 14, 17, 20, 25, 26, 28, 29, 30, 38, 40, 41, 66, 71

WCDMA: 1, 2, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

CDMA: 850, 1900

AMPS: 850

Data Technology HSDPA 3.6 1xRTT NR (5G) LTE (Cat 11) 1xRTT
Features 
Barometer - - Yes Yes -
Fingerprint Reader - - Yes
in-display (ultrasonic)
Yes
stand-alone
-
Flashlight - - Yes Yes Yes
GPS / Location n/a Yes n/a n/a Yes
Water-Resistant - - Yes
IPX8 (SCUBA)
- -
Accessibility
Hearing Aid Compatible - - Yes
M3, T3 (mostly tele-coil compatible)
Yes
M3, T3 (mostly tele-coil compatible)
-
Multiple Languages n/a Yes n/a n/a -
TTY/TDD (Digital) Yes Yes Yes Yes Yes
Alerts
Extra Display - Yes - - Yes
Ringer Profiles Yes - - - -
Connectivity
Bluetooth Yes - Yes Yes -
NFC - - Yes Yes -
USB Yes Yes Yes
USB Type C
Yes
USB Type C
Yes
Wi-Fi - - Yes
6 (802.11 a,ac,ax,b,g,n)
Yes
5 (802.11 a,ac,b,g,n)
-
Contacts
Picture ID n/a Yes n/a n/a Yes
Ringer ID n/a Yes n/a n/a Yes
Voice Dialing n/a Yes n/a n/a Yes
Customization
Changeable Body Plates - - - - Yes
Custom Graphics n/a Yes n/a n/a Yes
Custom Ringtones n/a Yes n/a n/a Yes
Real-Music Ringers n/a - n/a n/a -
Data & Network
Data Tethering n/a Yes n/a n/a Yes
WAP / Web Browser n/a Yes n/a n/a Yes
Input
Predictive Text Entry n/a Yes n/a n/a Yes
Side Keys Yes - Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen - - Yes
Capacitive
Yes
Capacitive
-
Memory
Memory Card Slot Yes - - - -
Messaging
Email Client n/a - n/a n/a -
Instant Messaging n/a - n/a n/a -
MMS n/a - n/a n/a -
Text Messaging Templates n/a Yes n/a n/a -
Music
Headphone Jack (3.5mm) - - - Yes -
Music Player n/a - n/a n/a -
Stereo Speakers - - Yes Yes -
Photo & Video
TV Output - - Yes - -
Power
Fast Charging - - Yes Yes -
Wireless Charging - - Yes - -
Productivity
Alarm n/a Yes n/a n/a Yes
Calculator n/a Yes n/a n/a Yes
Calendar n/a Yes n/a n/a Yes
To-Do List n/a - n/a n/a Yes
Voice Memo n/a Yes n/a n/a Yes
Software
BREW n/a Yes * n/a n/a -
Games n/a Yes n/a n/a Yes
Java (J2ME) n/a Yes * n/a n/a Yes
Voice
Call Screening - - - Yes Yes
HD Voice - - Yes Yes -
Headset Jack (2.5 mm) n/a Yes n/a n/a Yes
Push-To-Talk - - - - Yes
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Pantech Matrix Pro C820 Audiovox CDM-8920 / PM8920 Samsung Galaxy S21 Google Pixel 3a XL Sanyo MM-8300
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Pantech Matrix Pro C820 Audiovox CDM-8920 / PM8920 Samsung Galaxy S21 Google Pixel 3a XL Sanyo MM-8300

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