Oppo Ace2 vs Xiaomi Redmi K40 Pro+

Oppo Ace2

Xiaomi Redmi K40 Pro+

Network
2G network

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

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

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

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 34, 38, 39, 40, 41 - China

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, 3, 41, 78, 79 SA/NSA - China

5G band 1, 3, 28, 41, 77, 78 SA/NSA/Sub6
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

3.1 Mbps download, 1.8 Mbps upload

-
LTE speed

LTE Cat 20

LTE-A, 1174 Mbps download, 210 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Class 8

Design
Build

Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame

Glass, Metal
SIM

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

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

160 mm

163.7 mm
Width

75.4 mm

76.4 mm
Thickness

8.6 mm

7.8 mm
Weight

186 g

196 g
Splash resistant

-

IP53
Dust proof

-

IP53
Colors

Grey, Purple, Silver

Aurora, Black, White

Display
Display type

AMOLED capacitive touchscreen

Super AMOLED
Physical size

6.55 inches

6.67 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

402 ppi

395 ppi
Display colors

16777216

16777216
Protection

2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 5

Scratch resistant, 3D curved glass screen, Corning Gorilla Glass 5
Display features

500 nits typ. brightness, HDR10+, 90Hz refresh rate

120Hz, HDR10+, 1300 nits (peak), sunscreen 3.0, night light screen

Main camera
Camera type

Quad

Triple
Main camera

48 MP, f/1.7 , 26 mm, 1/2.0" , 0.8 µm

108 MP, f/1.8 , 26 mm, 1/1.52" , 0.7 µm, (wide)
8 MP, f/2.2 , 13 mm, 1/4.0" , 1.12 µm

8 MP, f/2.2 , (ultrawide) , 119˚
2 MP

5 MP, (macro) , 50 mm, 1/5.0" , 1.12 µm
2 MP
Primary camera resolution

8000 x 6000 pixels

9280 x 6920 pixels
Primary camera video

4K@30/60fps, 1080p@30/60/240fps; gyro-EIS

8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS, HDR10+
Primary camera flash

LED flash

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, contrast detection autofocus

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, phase detection autofocus
DxOMark photo

-

113
DxOMark zoom

-

42
DxOMark video

-

102
DxOMark camera score

-

108

Selfie camera
Selfie camera type

-

Single
Selfie camera

16 MP, f/2.4 , 29 mm, 1/3.06" , 1.0 µm

20 MP, 1/3.4" , 0.8 µm, (wide)
Selfie camera resolution

4608 x 3456 pixels

5184 x 3880 pixels
Selfie camera features

-

Face unlock, HDR
Selfie camera video

1080p@30fps

1080p@30fps, 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
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.1

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

-

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with dual-band A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
Beidou

Yes

-
BDS

-

Yes
QZSS

Yes

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

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

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4000 mAh

4520 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

SuperVOOC 2.0 (100% in 30 min)

Quick Charge 3.0 (100% in 52 min)
Wireless charging

50% in 30 min

-
Wireless reverse charging

Yes

-

Oppo Ace2 comparisons