Oppo Realme C21Y vs Realme C12

Here we compared two budget smartphones: the 6.5-inch Oppo Realme C21Y (with Unisoc T610) that was released on June 21, 2021, against the Oppo Realme C12, which is powered by MediaTek Helio G35 and came out 11 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Oppo Realme C21Y
  • 54% better performance in AnTuTu Benchmark (193K versus 125K)
  • Uses a faster type of memory: LPDDR4X 1866 MHz
  • The phone is 11-months newer
  • Reverse charging feature
  • 2x faster in single-core GeekBench 5 test: 349 and 177 points
Reasons to consider the Oppo Realme C12
  • Comes with 1000 mAh larger battery capacity: 6000 vs 5000 mAh

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

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.
Price

Tests and specifications

Comparison table of technical specifications and tests

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
HDR support No No
Screen protection Tempered glass Corning Gorilla Glass
Screen-to-body ratio 81.6% 81.7%
Max. Brightness
397 nits
418 nits

Design and build

Height 164.5 mm (6.48 inches) 164.5 mm (6.48 inches)
Width 76 mm (2.99 inches) 75.9 mm (2.99 inches)
Thickness 9.1 mm (0.36 inches) 9.8 mm (0.39 inches)
Weight 200 gramm (7.05 oz) 209 gramm (7.37 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors Black, Blue Silver, Blue, Red
Fingerprint scanner Yes, rear Yes, rear
Screen-to-body ratio
81.6%
81.7%

Performance

Tests of Oppo Realme C21Y and Oppo Realme C12 in the benchmarks
SoC
Chipset Unisoc T610 MediaTek Helio G35
Max. clock 1800 MHz 2300 MHz
CPU cores 8 (2 + 6) 8 (8)
Architecture - 6 cores at 1.82 GHz: Cortex-A55
- 2 cores at 1.82 GHz: Cortex-A75
- 8 cores at 2.3 GHz: Cortex-A53
L3 cache 1 MB -
Lithography process 12 nanometers 12 nanometers
Graphics ARM Mali G52 MP2 IMG PowerVR GE8320
GPU clock 614 MHz 680 MHz
FLOPS ~71.2 GFLOPS ~54.4 GFLOPS
Memory
RAM size 3, 4 GB 3 GB
Memory type LPDDR4X LPDDR3
Memory clock 1866 MHz 933 MHz
Channels 2 1
Storage
Storage size 32, 64 GB 32 GB
Storage type eMMC 5.1 eMMC 5.1
Memory card MicroSD MicroSD
Memory card max. size Up to 256 GB Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core)
349
Geekbench 5 (Multi-Core)
1303
1000
AnTuTu Benchmark 9
193009
125075
CPU 66485 47134
GPU 32103 14778
Memory 37779 32235
UX 57506 31792
Total score 193009 125075

Software

Operating system Android 11 Android 10 (Can be upgraded to Android 11)
ROM Realme UI 2.0 Realme UI 1.0

Battery

Specifications
Capacity 5000 mAh 6000 mAh
Charge power 10 W 10 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging Yes No
Fast charging No No
Full charging time 3:00 hr 3:35 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 + 2 MP) 3 (13 MP + 2 MP + 2 MP)
Wide (main) lens - 13 MP
- Aperture: f/2.2
- Focal length: 26 mm
- Sensor: 1/3.06" (CMOS)
- Phase autofocus
- 13 MP
- Aperture: f/2.2
- 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
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5" (CMOS)
Depth lens - 2 MP
- Aperture: f/2.4
-
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/2.0
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 1080p (Full HD) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 4 (802.11 a/b/g/n) Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi features - Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features LE, HID, A2DP 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 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 7
5G support No No

Sound

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

Other

Category Budget Budget
Announced June 2021 August 2020
Release date July 2021 September 2020
Sensors - Proximity sensor
- Accelerometer
- Ambient light sensor
- Compass
- 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

If the display, performance, camera, and design are more important to you, then choose the Oppo Realme C21Y. But if the battery life is more of a priority – go for the Oppo Realme C12.

Cast your vote

So, which phone would you choose?
2 (66.7%)
1 (33.3%)
Total votes: 3

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