Oppo K9x vs Xiaomi Mix Fold 2

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

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

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

HSDPA 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, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42
5G network

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

5G band 1, 3, 5, 8, 20, 28, 38, 40, 41, 77, 78, 79 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A, 750 Mbps download, 211 Mbps upload

LTE-A (CA)
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS LCD

Foldable LTPO2 OLED
Physical size

6.49 inches

8.02 inches
Resolution

1080 x 2400 pixels

1914 x 2160 pixels
Pixel density

405 ppi

360 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant, 2.5D curved glass screen, Aluminosilicate glass

Schott UTG glass, Corning Gorilla Glass Victus
Display features

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

120Hz, HDR10+, Dolby Vision, 1000 nits (HBM), 1300 nits (peak)
Cover display

-

AMOLED
Cover display physical size

-

6.56 inches
Cover display resolution

-

1080 x 2520 pixels
Cover display features

-

120Hz, HDR10+, Dolby Vision, 1000 nits (HBM), 1300 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/1.8 , 1/1.56" , 1.0 µm
(macro) , 2 MP, f/2.4 , 89˚ , 1/5" , 1.75 µm

(telephoto) , 8 MP, f/2.6 , 45 mm, 2x optical zoom
89˚ , (depth) , 2 MP, f/2.4 , 1/5" , 1.75 µm

123 , (ultrawide) , 13 MP, f/2.4 , 1.12 µm, 15 mm
Primary camera resolution

9280 x 6920 pixels

8190 x 6120 pixels
Primary camera video

1080p@30fps, gyro-EIS

8K@24/30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS
Primary camera flash

LED flash

dual LED 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, 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, phase detection autofocus, Dolby Vision, Leica Native Dual Quality, super night 2.0

Selfie camera
Selfie camera type

Single

Single
Selfie camera

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

(wide) , 20 MP, f/2.4 , 1/3.4" , 0.8 µm, 27 mm
Selfie camera resolution

4640 x 3456 pixels

5184 x 3880 pixels
Selfie camera features

Face unlock, HDR

Face unlock, HDR, Dolby Vision
Selfie camera video

1080p@30fps

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

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
USB On-The-Go

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, barometer, compass, color spectrum, fingerprint, gyroscope, proximity

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 40 min)
Reverse charging

Yes

-