Oppo Reno9 vs Xiaomi 12X

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

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

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

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

LTE frequency band 1, 3, 4, 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, 5, 8, 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
LTE speed

LTE-A (CA)

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

AMOLED

OLED
Physical size

6.7 inches

6.28 inches
Resolution

1080 x 2412 pixels

1080 x 2400 pixels
Pixel density

394 ppi

419 ppi
Display colors

1073741824

1073741824
Protection

Scratch resistant, 3D curved glass screen, Asahi Glass AGC DT-Star2

Scratch resistant, Corning Gorilla Glass Victus
Display features

120Hz, HDR10+, 500 nits (typ), 800 nits (HBM), 950 nits (peak)

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

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 2.14 GHz Cortex-A78

Single-core 3.2 GHz Kryo 585
CPU(second)

Triple-core 2.2 GHz Cortex-A78

Triple-core 2.42 GHz Kryo 585
CPU(third)

Quad-core 1.9 GHz Cortex-A55

Quad-core 1.8 GHz Kryo 585
Chipset

Qualcomm SM7325 Snapdragon 778G 5G

Qualcomm SM8250-AC Snapdragon 870 5G
GPU

Adreno 642L

Adreno 650
Memory RAM

8, 12 GB

8, 12 GB
Internal storage

256, 512 GB

128, 256 GB
Memory card

No

No
Storage

UFS 3.1, UFS 2.2

UFS 3.1

Main camera
Camera type

Dual

Triple
Main camera

(wide) , 64 MP, f/1.8 , 80˚ , 26 mm, 1/2" , 0.7 µm

(wide) , 50 MP, f/1.9 , 26 mm, 1/1.56" , 1.0 µm
(depth) , 2 MP, f/2.4 , 89˚ , 1/5" , 1.75 µm

(ultrawide) , 13 MP, f/2.4 , 123˚ , 1/3.06" , 1.12 µm, 12 mm
(telephoto macro) , 5 MP, 50 mm
Primary camera resolution

9280 x 6920 pixels

8190 x 6144 pixels
Primary camera video

4K@30fps, 1080p@30/60/120fps, gyro-EIS

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

LED flash

dual-LED dual-tone flash
Camera features

Autofocus, continuous 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, phase detection autofocus, super night mode 2.0, HDR10 video recording

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 32 MP, f/2.4 , 22 mm, 1/2.74" , 0.8 µm

(wide) , 32 MP, 26 mm, 0.7 µm, 80˚
Selfie camera features

Face unlock, autofocus

Face unlock, HDR
Selfie camera video

1080p@30fps, gyro-EIS

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

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax

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

-

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

v5.2

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
Infrared

Yes

Yes
NFC

Yes, eSE, HCE, NFC-SIM

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity

Accelerometer, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4500 mAh

4500 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

SuperVOOC, 67W (33% in 10 min, 100% in 44 min)

Quick Charge 4, 67W (100% in 39 min)
Reverse charging

Yes

-
Wireless reverse charging

-

Yes, 10W
Fast wireless charging

-

Yes, 50W