Oppo A8 vs Samsung Galaxy S21 Ultra 5G

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA

GSM 850, 900, 1800, 1900; CDMA 800, 1900 & TD-SCDMA
3G network

HSDPA 850, 900, 2100

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO
4G network

LTE frequency band 1(2100), 5(850), 7(2600), 8(900), 39(1900), 40(2300), 41(2500)

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

-

5G band SA/NSA/Sub6/mmWave
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A (CA), 2000 Mbps download, 200 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic

Glass front (Gorilla Glass Victus), glass back (Gorilla Glass), aluminum frame
SIM

Dual SIM (Nano-SIM, dual stand-by)

Single SIM (Nano-SIM and/or eSIM) or Dual SIM (Nano-SIM and/or eSIM, dual stand-by)
Height

163.9 mm

165.1 mm
Width

75.5 mm

75.6 mm
Thickness

8.3 mm

8.9 mm
Weight

180 g

227 (Sub6) / 229 (mmWave) g
Payment

-

Samsung Pay (Visa, MasterCard certified)
Waterproof

-

IP68 (1.5m and 30 mins)
Dust proof

-

IP68
Colors

Black, Green

Black, Brown, Silver, Navy, Titanium

Display
Display type

IPS LCD capacitive touchscreen

Dynamic AMOLED 2X
Physical size

6.5 inches

6.8 inches
Resolution

720 x 1600 pixels

1440 x 3200 pixels
Pixel density

270 ppi

515 ppi
Display colors

16777216

16777216
Protection

Scratch resistant

Scratch resistant, Corning Gorilla Glass Victus
Multitouch

Yes

-
Display features

-

120Hz, HDR10+, 1500 nits (peak), Infinity-O display, Always-On display
DxOMark display score

-

91

Main camera
Camera type

Triple

Quad
Main camera

12 MP, f/1.8

108 MP, f/1.8 , (wide) , 26 mm, 1/1.33" , 0.8 µm
2 MP, f/2.4 , 1/5" , 1.75 µm

10 MP, f/4.9 , 1/3.24" , 1.22 µm, (periscope telephoto) , 10x optical zoom
2 MP, f/2.4 , 1/5" , 1.75 µm

10 MP, f/2.4 , 1/3.24" , 1.22 µm, (telephoto) , 70 mm, 3x optical zoom
(ultrawide) , 12 MP, f/2.2 , 13 mm, 1/2.55" , 1.4 µm
Primary camera resolution

4032 x 3120 pixels

12000 x 9000 pixels
Primary camera video

1080p@30fps

8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS
Primary camera flash

LED flash

LED flash
Camera features

Autofocus, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro mode, phase detection autofocus

Autofocus, continuous shooting, digital zoom, optical zoom, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus, laser autofocus
DxOMark photo

-

128
DxOMark zoom

-

76
DxOMark video

-

98
DxOMark camera score

-

121

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax, 6E
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

microUSB 2.0

Type-C 3.2
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

-

Yes
Beidou

Yes

-
BDS

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity, light

Accelerometer, barometer, compass, fingerprint, gyroscope, proximity