Oppo K9x vs Xiaomi 12S

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900;CDMA 800
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO
4G network

LTE frequency band 1, 2, 3, 5, 7, 8, 28, 34, 38, 39, 40, 41

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42
5G network

5G band 1, 28, 41, 77, 78 SA/NSA

5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

-

EV-DO Rev.A 2.4 Mbps download, 0.15 Mbps upload
LTE speed

LTE-A, 750 Mbps download, 211 Mbps upload

LTE-A
GPRS

Yes

Class 33
EDGE

Yes

Class 33

Design
Build

Plastic, glass

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

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

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

162.2 mm

152.7 mm
Width

74.8 mm

69.9 mm
Thickness

8.8 mm

8.2/8.7 mm
Weight

194 g

179/182 g
Colors

Black, Blue

Gray, Green, Purple, White

Display
Display type

IPS LCD

AMOLED
Physical size

6.49 inches

6.28 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

405 ppi

419 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant, 2.5D curved glass screen, Aluminosilicate glass

Scratch resistant, Corning Gorilla Glass Victus
Display features

90Hz, 480 nits (typ), 600 nits (HBM)

120Hz, Dolby Vision, HDR10+, 1100 nits (peak)

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 64 MP, f/1.7 , 81˚ , 26 mm, 1/1.97" , 0.7 µm, 20x digital zoom

(wide) , 50 MP, f/1.9 , 24 mm, 1/1.28" , 1.22 µm
(macro) , 2 MP, f/2.4 , 89˚ , 1/5" , 1.75 µm

(ultrawide) , 13 MP, f/2.4 , 123˚ , 1/3.06" , 1.22 µm, 15 mm
89˚ , (depth) , 2 MP, f/2.4 , 1/5" , 1.75 µm

(telephoto macro) , 5 MP, f/2.4 , 50 mm
Primary camera resolution

9280 x 6920 pixels

8190 x 6144 pixels
Primary camera video

1080p@30fps, gyro-EIS

8K@24fps, 4K@30/60fps, 1080p@30/60fps, 720p@1920fps, gyro-EIS
Primary camera optics

-

Leica lens
Primary camera flash

LED flash

dual-LED dual-tone flash
Camera features

Autofocus, continuous shooting, digital zoom, digital image stabilization, 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 autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, face unlock, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, super night mode 2.0, cyberfocus

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 16 MP, f/2.0 , 79˚ , 1/3.0" , 1.0 µm

(wide) , 32 MP, f/2.5 , 80˚ , 0.7 µm, 26 mm
Selfie camera resolution

4640 x 3456 pixels

-
Selfie camera features

Face unlock, HDR

Face unlock, HDR
Selfie camera video

1080p@30fps

1080p@30/60fps, 720p@120fps, HDR

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
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.1

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

Yes

-
Infrared

-

Yes
NFC

No

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

-

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Accelerometer, color spectrum, compass, fingerprint, gyroscope

Battery
Battery type

Li-Po

Li-Po
Battery capacity

5000 mAh

4500 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

VOOC 4.0, 33W (50% in 27 min)

Quick Charge 4+, 67W (100% in 42 min)
Reverse charging

Yes

-
Wireless reverse charging

-

Yes, 10W
Fast wireless charging

-

Yes, 50W (100% in 57 min)