OnePlus 9 vs Realme C31

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 800, 850, 900, 1700(AWS), 1800, 1900, 2100

HSDPA 850, 900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - EU; 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 38, 39, 40, 41, 46, 48, 66, 71 - North America; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 34, 38, 39, 40, 41, 46 - IN; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 34, 38, 39, 40, 41 - China

LTE
5G network

5G band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 78 SA/NSA - EU; 1, 2, 3, 5, 7, 8, 20, 25, 28, 38, 40, 41, 48, 66, 71, 77, 78 SA/NSA - North America; 41, 78 SA/NSA - IN; 1, 3, 28, 41, 78, 79 SA/NSA - China

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HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

EV-DO Rev.A 3.1 Mbps download, 1.8 Mbps upload

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LTE speed

LTE-A (5CA), Cat20, 2000 Mbps download, 200 Mbps upload

LTE-A, 151 Mbps download, 51 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass), glass back (Gorilla Glass), plastic frame

Glass front, plastic frame, plastic back
SIM

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

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

160 mm

164.7 mm
Width

74.2 / 73.9 (EU, North America/IN, China) mm

76.2 mm
Thickness

8.7 / 8.1 (EU, North America/IN, China) mm

8.4 mm
Weight

192 / 183 (EU, North America/IN, China) g

197 g
Waterproof

IP68

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Dust proof

IP68

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Colors

Black, Sky, Winter Mist

Green, Silver

Display
Display type

Fluid AMOLED

IPS LCD
Physical size

6.55 inches

6.5 inches
Resolution

1080 x 2400 pixels

720 x 1600 pixels
Pixel density

402 ppi

270 ppi
Display colors

16777216

16777216
Protection

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

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Display features

Always-on display, 120Hz, HDR10+, 1100 nits (peak)

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Main camera
Camera type

Triple

Triple
Main camera

(wide) , 48 MP, f/1.8 , 23 mm, 1/1.43" , 1.12 µm

(wide) , 13 MP, f/2.2 , 24 mm, 81˚ , 4x digital zoom
(ultrawide) , 50 MP, f/2.2 , 14 mm, 1/1.56" , 1.0 µm

(macro) , 2 MP, f/2.4
(depth) , 2 MP, f/2.4

(depth) , 0.3 MP, f/2.8
Primary camera resolution

8000 x 6000 pixels

4208 x 3120 pixels
Primary camera video

8K@30fps, 4K@30/60fps, 1080p@30/60/240fps, Auto HDR, gyro-EIS

1080p@30fps
Primary camera flash

dual-LED flash

LED flash
Camera features

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, Hasselblad Pro mode, dual native ISO, 2.2 OCL

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Connectivity
WLAN

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

Wi-Fi 802.11b, 802.11g, 802.11n
WLAN WiFi Hotspot

Yes

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WLAN WiFi Direct

Yes

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WLAN WiFi Dual Band

Yes

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WLAN DLNA

Yes

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USB

Type-C 3.1

microUSB 2.0
USB On-The-Go

Yes

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Bluetooth

v5.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

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Bluetooth AptX

aptX HD

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NFC

Yes

No
GPS

Yes, with dual-band A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
SBAS

Yes

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