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Phone Pantech Duo C810 Motorola i85s / i88s Samsung Galaxy A21 Samsung Renown U810 Samsung Galaxy Z Flip
Current U.S. Carriers (none) (none) (none) (none) (none)
Global Availability Released Released Released Released Released
Specifications 
Display Size 2.2" diag.
4 : 3
? 6.5" diag.
20 : 9
2.3" diag.
4 : 3
6.7" diag.
22 : 9
Display Resolution & Type 240 x 320 pixels
(~182 ppi)
LCD (TFT/TFD)
?
LCD (Grayscale)
720 x 1600 pixels
(~270 ppi)
LCD (TFT/TFD)
240 x 320 pixels
(~174 ppi)
LCD (TFT/TFD)
1080 x 2636 pixels
(~425 ppi)
AMOLED
Display Refresh ? ? 60 Hz ? 60 Hz
Battery 1,320 mAh 750 mAh 4,000 mAh 800 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 ? raw hardware 256 GB
Main Camera 1 megapixel - 16 megapixel 2 megapixel 12 megapixel
Wide Camera - - 8 megapixel - 12 megapixel
Tele Camera - - - - -
Video Capture QVGA (320 x 240) - 1080p HD QVGA (320 x 240) 4K UHD
Front Camera - - 13 megapixel - 10 megapixel
Weight 3.88 oz
(110g)
4.8 oz
(136g)
6.81 oz
(193g)
4.05 oz
(115g)
6.46 oz
(183g)
Dimensions 4.01" x 1.97" x 0.78"
(102 x 50 x 19.8 mm)
5.16" x 1.97" x 1.14"
(131 x 50 x 29 mm)
6.61" x 3.02" x 0.32"
(168 x 77 x 8.1 mm)
3.87" x 1.95" x 0.69"
(98 x 50 x 17.5 mm)
3.44" x 2.9" x 0.68"
(87 x 74 x 17.3 mm)
Form Factor Slide Slab Slab Clamshell Foldable
Platform / OS Windows Mobile Standard (proprietary) Android (proprietary) Android
Network Bands

WCDMA: 2, 5

GSM: 850, 900, 1800, 1900

iDEN: 800

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

CDMA: 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 HSDPA 1.8 - LTE (Cat 6) EVDO r0 LTE (Cat 16)
Features 
Barometer - - - - Yes
Fingerprint Reader - - Yes
stand-alone
- Yes
stand-alone
Flashlight - - Yes - Yes
GPS / Location n/a Yes * n/a Yes n/a
Accessibility
Adjustable Text Size n/a - n/a Yes n/a
Hearing Aid Compatible - - Yes
M4, T3 (mostly tele-coil compatible)
Yes
M3, T4 (very tele-coil compatible)
Yes
M4, T3 (mostly tele-coil compatible)
Multiple Languages n/a Yes n/a Yes n/a
TTY/TDD (Digital) - Yes Yes Yes Yes
Alerts
Extra Display - - - Yes Yes
Ringer Profiles Yes Yes - - -
Connectivity
Bluetooth Yes - Yes Yes Yes
MirrorLink - - - - Yes
NFC - - Yes - Yes
USB Yes - Yes
USB Type C
Yes 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 n/a - n/a Yes n/a
Ringer ID n/a - n/a Yes n/a
Voice Dialing n/a Yes n/a Yes n/a
Customization
Custom Graphics n/a - n/a Yes n/a
Custom Ringtones n/a - n/a Yes n/a
Real-Music Ringers n/a - n/a - n/a
Data & Network
Data Tethering n/a Yes n/a Yes n/a
WAP / Web Browser n/a Yes n/a Yes n/a
Input
Predictive Text Entry n/a Yes n/a Yes n/a
Side Keys Yes Yes Yes Yes Yes
Text Keyboard, Hardware Yes - - - -
Touch Screen - - Yes
Capacitive
- Yes
Capacitive
Memory
Memory Card Slot Yes - Yes Yes -
Messaging
Email Client n/a - n/a Yes n/a
EMS / Picture Messaging n/a - n/a Yes n/a
Instant Messaging n/a - n/a Yes n/a
MMS n/a - n/a Yes n/a
Text Messaging Templates n/a - n/a Yes n/a
Music
Headphone Jack (3.5mm) - - Yes - -
Music Player n/a - n/a Yes n/a
Photo & Video
TV Output - - - - Yes
Power
Fast Charging - - Yes - Yes
Wireless Charging - - - - Yes
Productivity
Alarm n/a Yes n/a Yes n/a
Calculator n/a - n/a Yes n/a
Calendar n/a Yes n/a Yes n/a
To-Do List n/a - n/a - n/a
Voice Memo n/a Yes n/a - n/a
Software
BREW n/a - n/a Yes n/a
Games n/a - n/a Yes n/a
Java (J2ME) n/a Yes n/a - n/a
Voice
HD Voice - - Yes - Yes
Headset Jack (2.5 mm) n/a Yes n/a Yes n/a
Push-To-Talk - Yes - - -
Speaker Phone Yes Yes Yes Yes Yes
  * Some versions only
  Pantech Duo C810 Motorola i85s / i88s Samsung Galaxy A21 Samsung Renown U810 Samsung Galaxy Z Flip
  X > < X > < X > < X > < X

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

 
Phone Pantech Duo C810 Motorola i85s / i88s Samsung Galaxy A21 Samsung Renown U810 Samsung Galaxy Z Flip

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