Oppo Reno 4 vs Xiaomi Mi A2

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 34, 38, 39, 40, 41

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) - China
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
HSPA speed

-

HSPA
LTE speed

LTE-A

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front, plastic back, plastic frame

Front glass, aluminum body
SIM

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

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

160.3 mm

158.7 mm
Width

73.9 mm

75.4 mm
Thickness

7.7 mm

7.3 mm
Weight

165 g

168 g
Colors

Black, Blue

Black, Cherry Pink, Flame Red, Glacier Blue, Sand Gold

Main camera
Camera type

Quad

Dual
Main camera

48 MP, f/1.7 , 26 mm, 1/2.0" , 0.8 µm

12 MP, f/1.8 , 1/2.9" , 1.25 µm, 2x optical zoom
8 MP, f/2.2 , 1/4.0" , 1.12 µm

20 MP, f/1.8 , 1/2.8" , 1 µm
2 MP, f/2.4
2 MP, f/2.4
Primary camera resolution

8000 x 6000 pixels

4000 x 3000 pixels
Primary camera video

4K@30fps, 1080p@30fps

2160p@30fps, 1080p@30fps, 720p@120fps
Primary camera Autofocus

-

phase detection autofocus
Primary camera flash

LED flash

LED flash
Electronic image stabilization

-

EIS (gyro)
Camera features

Autofocus, continuous autofocus, continuous shooting, digital zoom, digital image stabilization, optical 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, contrast detection autofocus

Geo-tagging, HDR, face detection, panorama, touch focus

Selfie camera
Selfie camera

32 MP, f/2.4 , 26 mm, 1/2.8" , 0.8 µm

20 MP, f/1.8 , 1/2.8" , 1.0 µm
Selfie camera resolution

6560 x 4928 pixels

5384 x 3752 pixels
Secondary camera HDR

-

Auto HDR
Selfie camera video

1080p@30fps

1080p@30fps

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, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

Type-C 1.0 reversible connector
USB On-The-Go

Yes

-
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
BDS

Yes

Yes

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging IM

-

IM
Messaging Push Email

-

Push Email
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Fingerprint (rear-mounted), accelerometer, compass, gyro, proximity