Oppo Realme C31 vs Realme C21

Oppo Realme C31 Oppo Realme C21

Here we compared two budget smartphones: the 6.5-inch Oppo Realme C31 (with Unisoc Tiger T612) that was released on March 25 2022 against the Oppo Realme C21 which is powered by MediaTek Helio G35 and came out 13 months before. On this page you will find tests full specs strengths and weaknesses of each of the gadgets.

Differences
Review
Specs
Benchmarks
Battery life
Camera
Comments

Key differences

An overview of the main advantages of each smartphone Reasons to consider the Oppo Realme C31

60% better performance in AnTuTu Benchmark (211K versus 132K)
The phone is 1-year and 1-month newer
Faster storage type - UFS 2.2 versus eMMC 5.1
2x faster in single-core GeekBench 5 test: 349 and 174 points

Reasons to consider the Oppo Realme C21

Reverse charging feature
The front-facing camera can record video at 1080p

Review

Display Screen quality color accuracy brightness Realme C31 56 Realme C21 55 Performance CPU/GPU performance in apps and games Realme C31 28 Realme C21 24 Battery Battery life charging type and speed Realme C31 70 Realme C21 70 Camera Photo and video recording quality Realme C31 48 Realme C21 46 Connectivity Networks ports data transmission Realme C31 62 Realme C21 58 NanoReview score Final comparison evaluation Realme C31 52 Realme C21 49

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money. Oppo Realme C31 Price Oppo Realme C21 Calculate

Tests and specifications

Comparison table of technical specifications and tests Phone: Realme C31 vs Realme C21

Display

Type	IPS LCD	IPS LCD
Size	6.5 inches	6.5 inches
Resolution	720 x 1600 pixels	720 x 1600 pixels
Aspect ratio	20:9	20:9
PPI	270 ppi	270 ppi
Refresh rate	60 Hz	60 Hz
Max rated brightness	415 nits	450 nits
HDR support	No	No
Screen protection	Tempered glass	Tempered glass
Screen-to-body ratio	81.4%	80.8%

Display tests
PWM	Not detected	-
Response time	48 ms	-
Contrast	1033:1	-

Peak brightness test (auto) Realme C31 394 nits Realme C21 n/a Sources: NotebookCheck [3]

Design and build

Height	164.7 mm (6.48 inches)	165.2 mm (6.5 inches)
Width	76.1 mm (3 inches)	76.4 mm (3.01 inches)
Thickness	8.4 mm (0.33 inches)	8.9 mm (0.35 inches)
Weight	197 gramm (6.95 oz)	190 gramm (6.7 oz)
Waterproof	No	No
Rear material	Plastic	Plastic
Frame material	Plastic	Plastic
Colors	Silver Green	Black Blue
Fingerprint scanner	Yes in home button	Yes rear

Screen-to-body ratio Realme C31 +1% 81.4% Realme C21 80.8%

Performance

Tests of Oppo Realme C31 and Oppo Realme C21 in the benchmarks

SoC
Chipset	Unisoc Tiger T612	MediaTek Helio G35
Max. clock	1800 MHz	2300 MHz
CPU cores	8 (2 + 6)	8 (4 + 4)
Architecture	- 6 cores at 1.8 GHz: Cortex-A55 - 2 cores at 1.8 GHz: Cortex-A75	- 4 cores at 1.8 GHz: Cortex-A53 - 4 cores at 2.3 GHz: Cortex-A53
Lithography process	12 nanometers	12 nanometers
Graphics	Mali-G57 MP1	IMG PowerVR GE8320
GPU clock	614 MHz	680 MHz
FLOPS	-	~54.4 GFLOPS

Memory
RAM size	3 4 GB	3 4 GB
Memory type	LPDDR4X	LPDDR4X
Memory clock	-	1866 MHz
Channels	2	2

Storage
Storage size	32 64 GB	32 64 GB
Storage type	UFS 2.2	eMMC 5.1
Memory card	MicroSD	MicroSD
Memory card max. size	Up to 1024 GB	Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core) Realme C31 +101% 349 Realme C21 174 Geekbench 5 (Multi-Core) Realme C31 +34% 1332 Realme C21 994 AnTuTu Benchmark 9 Realme C31 +60% 211823 Realme C21 132371

CPU	67603	39772
GPU	22171	16631
Memory	61955	33664
UX	58129	41494
Total score	211823	132371

3DMark Wild Life Performance Realme C31 413 Realme C21 n/a

PCMark 3.0 score

7589

Sources: 3DMark [3] ▶️ Submit your AnTuTu result

Software

Operating system	Android 11	Android 10 (Can be upgraded to Android 11)
ROM	Realme UI 2.0	Realme UI 2.0

Battery

Specifications
Capacity	5000 mAh	5000 mAh
Charge power	10 W	10 W
Battery type	-	Li-Po
Replaceable	No	No
Wireless charging	No	No
Reverse charging	No	Yes
Fast charging	No	No
Full charging time	-	2:55 hr

Camera

Specs and camera test of smartphones

Main camera
Matrix	13 megapixels	13 megapixels
Image resolution	4128 x 3096	4128 x 3096
Zoom	Digital	Digital
Flash	LED	LED
Stabilization	Digital	Digital
8K video recording	No	No
4K video recording	No	No
1080p video recording	Up to 30FPS	Up to 30FPS
Slow motion	No	No
Lenses	3 (13 MP + 2 MP + 0.3 MP)	3 (13 MP + 2 MP + 2 MP)
Wide (main) lens	- 13 MP - Aperture: f/2.2 - Focal length: 25 mm - Pixel size: 1.12 micron - Sensor: 1/3" (CMOS) - Phase autofocus	- 13 MP - Aperture: f/2.2 - Focal length: 26 mm - Pixel size: 1.12 micron - Sensor: 1/3" (CMOS) - Phase autofocus
Monochrome lens	-	- 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5" (CMOS)
Macro lens	- 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5" (CMOS)	- 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5" (CMOS)
Depth lens	- 0.3 MP - Aperture: f/2.8	-
Camera features	- Bokeh mode	- Bokeh mode

Selfie camera
Megapixels	5 megapixels	5 megapixels
Image resolution	2560 x 1960	2560 x 1960
Aperture	f/2.2	f/2.2
Focal length	27 mm	27 mm
Pixel size	1.12 microns	1.12 microns
Sensor type	CMOS	CMOS
Sensor size	1/5"	1/5"
Video resolution	720p at 30 FPS	1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard	Wi-Fi 4 (802.11 b/g/n)	Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi features	- Wi-Fi Direct - Wi-Fi Hotspot	- Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display
Bluetooth version	5	5
Bluetooth features	LE	LE HID A2DP
USB type	Micro USB	Micro USB
USB version	2	2
USB features	- Charging - USB-Storage mode	- Charging - USB-Storage mode - OTG
GPS	GPS GLONASS Beidou Galileo	GPS GLONASS Beidou
NFC*	No	No
Infrared port	No	No

Network
Number of SIM*	2	2
Type of SIM card	Nano	Nano
Multi SIM mode	Standby	Standby
eSIM support*	No	No
Hybrid slot	No	No
LTE Cat*	-	7
5G support	No	No

Sound

Speakers	Mono	Mono
Headphone audio jack	Yes	Yes
FM radio	No	Yes
Dolby Atmos	No	No

Speakers test Max. loudness Realme C31 81 dB Realme C21 n/a

Other

Category	Budget	Budget
Announced	March 2022	March 2021
Release date	March 2022	March 2021
Sensors	- Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Fingerprint	- Proximity sensor - Accelerometer - Ambient light sensor - Compass - Fingerprint

*Disclaimer! NFC GSM network support and some other specs can be different depending on the country.

Conclusion

These smartphones have a lot in common but we would recommend the Oppo Realme C31. It has a better performance connectivity design and sound.

Cast your vote

So which phone would you choose? Oppo Realme C31 5 (55.6%) Oppo Realme C21 4 (44.4%) Vote Total votes: 9

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