Oppo A77s vs Xiaomi 12X

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 2100

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

LTE frequency band 1, 3, 5, 7, 8, 28, 38, 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, 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

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front, plastic frame, plastic back or eco leather back

Polycarbonate, aluminium alloy, glass
SIM

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

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

163.8 mm

152.7 mm
Width

75 mm

69.9 mm
Thickness

8 mm

8.2 mm
Weight

187/190 g

176 g
Waterproof

IP54

-
Dust proof

IP54

-
Colors

Black, Orange

Black, Blue, Pink

Display
Display type

IPS LCD

OLED
Physical size

6.56 inches

6.28 inches
Resolution

720 x 1612 pixels

1080 x 2400 pixels
Pixel density

269 ppi

419 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant, 2.5D curved glass screen

Scratch resistant, Corning Gorilla Glass Victus
Display features

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

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

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.4 GHz Kryo 265 Gold

Single-core 3.2 GHz Kryo 585
CPU(second)

quad-core 1.9 GHz Kryo 265 Silver

Triple-core 2.42 GHz Kryo 585
CPU(third)

Quad-core 1.8 GHz Kryo 585
Chipset

Qualcomm SM6225 Snapdragon 680 4G

Qualcomm SM8250-AC Snapdragon 870 5G
GPU

Adreno 610

Adreno 650
Memory RAM

8 GB

8, 12 GB
Internal storage

128 GB

128, 256 GB
Memory card

microSD, microSDHC, microSDXC

No
Memory card max

64 GB

-
Storage

UFS 2.2

UFS 3.1

Main camera
Camera type

Dual

Triple
Main camera

(wide) , 50 MP, f/1.8 , 77˚

(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

-

8190 x 6144 pixels
Primary camera video

1080p@30fps

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, 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) , 8 MP, f/2.0 , 26 mm

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

3264 x 2448 pixels

-
Selfie camera features

Panorama

Face unlock, HDR
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 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
Infrared

-

Yes
NFC

Yes

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, compass, fingerprint, proximity

Accelerometer, compass, 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

SuperVOOC, 33W (100% in 69 min)

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

-

Yes, 10W
Fast wireless charging

-

Yes, 50W