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Phone Samsung Renown U810 Pantech Duo C810 Samsung Galaxy A21 Samsung Galaxy Z Flip
Current U.S. Carriers (none) (none) (none) (none)
Global Availability Released Released Released Released
Specifications 
Display Size 2.3" diag.
4 : 3
2.2" diag.
4 : 3
6.5" diag.
20 : 9
6.7" diag.
22 : 9
Display Resolution & Type 240 x 320 pixels
(~174 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
1080 x 2636 pixels
(~425 ppi)
AMOLED
Display Refresh ? ? 60 Hz 60 Hz
Battery 800 mAh 1,320 mAh 4,000 mAh 3,300 mAh
Processor ? ARM 920t PXA27x 2 GHz MediaTek Helio P35 (MT6765) 3 GHz Qualcomm Snapdragon 855+
RAM ? ? 3 GB 8 GB
Storage ? raw hardware ? raw hardware 32 GB 256 GB
Main Camera 2 megapixel 1 megapixel 16 megapixel 12 megapixel
Wide Camera - - 8 megapixel 12 megapixel
Tele Camera - - - -
Video Capture QVGA (320 x 240) QVGA (320 x 240) 1080p HD 4K UHD
Front Camera - - 13 megapixel 10 megapixel
Weight 4.05 oz
(115g)
3.88 oz
(110g)
6.81 oz
(193g)
6.46 oz
(183g)
Dimensions 3.87" x 1.95" x 0.69"
(98 x 50 x 17.5 mm)
4.01" x 1.97" x 0.78"
(102 x 50 x 19.8 mm)
6.61" x 3.02" x 0.32"
(168 x 77 x 8.1 mm)
3.44" x 2.9" x 0.68"
(87 x 74 x 17.3 mm)
Form Factor Clamshell Slide Slab Foldable
Platform / OS (proprietary) Windows Mobile Standard Android Android
Network Bands

CDMA: 850, 1900

GSM: 850, 900, 1800, 1900

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

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

WCDMA: 2, 3, 4, 5, 8

CDMA: 800, 850, 1900

GSM: 850, 900, 1800, 1900

*

Data Technology EVDO r0 HSDPA 1.8 LTE (Cat 6) LTE (Cat 16)
Features 
Barometer - - - Yes
Fingerprint Reader - - Yes
stand-alone
Yes
stand-alone
Flashlight - - Yes Yes
GPS / Location Yes n/a n/a n/a
Accessibility
Adjustable Text Size Yes n/a n/a n/a
Hearing Aid Compatible Yes
M3, T4 (very tele-coil compatible)
- Yes
M4, T3 (mostly tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages Yes n/a n/a n/a
TTY/TDD (Digital) Yes - Yes Yes
Alerts
Extra Display Yes - - Yes
Ringer Profiles - Yes - -
Connectivity
Bluetooth Yes Yes Yes Yes
MirrorLink - - - Yes
NFC - - Yes Yes
USB Yes Yes 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 n/a
Ringer ID Yes n/a n/a n/a
Voice Dialing Yes n/a n/a n/a
Customization
Custom Graphics Yes n/a n/a n/a
Custom Ringtones Yes n/a n/a n/a
Real-Music Ringers - n/a n/a n/a
Data & Network
Data Tethering Yes n/a n/a n/a
WAP / Web Browser Yes n/a n/a n/a
Input
Predictive Text Entry Yes n/a n/a n/a
Side Keys Yes Yes Yes Yes
Text Keyboard, Hardware - Yes - -
Touch Screen - - Yes
Capacitive
Yes
Capacitive
Memory
Memory Card Slot Yes Yes Yes -
Messaging
Email Client Yes n/a n/a n/a
EMS / Picture Messaging Yes n/a n/a n/a
Instant Messaging Yes n/a n/a n/a
MMS Yes n/a n/a n/a
Text Messaging Templates Yes n/a n/a n/a
Music
Headphone Jack (3.5mm) - - Yes -
Music Player Yes n/a n/a n/a
Photo & Video
TV Output - - - Yes
Power
Fast Charging - - Yes Yes
Wireless Charging - - - Yes
Productivity
Alarm Yes n/a n/a n/a
Calculator Yes n/a n/a n/a
Calendar Yes n/a n/a n/a
To-Do List - n/a n/a n/a
Voice Memo - n/a n/a n/a
Software
BREW Yes n/a n/a n/a
Games Yes n/a n/a n/a
Voice
HD Voice - - Yes Yes
Headset Jack (2.5 mm) Yes n/a n/a n/a
Speaker Phone Yes Yes Yes Yes
  Samsung Renown U810 Pantech Duo C810 Samsung Galaxy A21 Samsung Galaxy Z Flip
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NOTE: Differences are highlighted with bold / black text for visual clarity only.

 
Phone Samsung Renown U810 Pantech Duo C810 Samsung Galaxy A21 Samsung Galaxy Z Flip

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