Samsung Galaxy A03s vs Oppo Realme C21

Here we compared two budget smartphones: the 6.5-inch Samsung Galaxy A03s (with MediaTek Helio P35) that was released on August 18, 2021, against the Oppo Realme C21, which is powered by MediaTek Helio G35 and came out 5 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 Samsung Galaxy A03s
  • Modern USB Type-C port
  • Supports 15W fast charging
  • More recent OS version: Android 12 versus 11
  • Supports Dolby Atmos sound technology
Reasons to consider the Oppo Realme C21
  • Reverse charging feature

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 PLS TFT 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 400 nits 450 nits
HDR support No No
Screen protection Tempered glass Tempered glass
Screen-to-body ratio 81.8% 80.8%
Display tests
RGB color space 93.9% -
PWM 806 Hz -
Response time 43 ms -
Contrast 1126:1 -
Peak brightness test (auto)
351 nits
Sources: NotebookCheck [3]

Design and build

Height 164.2 mm (6.46 inches) 165.2 mm (6.5 inches)
Width 75.9 mm (2.99 inches) 76.4 mm (3.01 inches)
Thickness 9.1 mm (0.36 inches) 8.9 mm (0.35 inches)
Weight 196 gramm (6.91 oz) 190 gramm (6.7 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors White, Black, Blue Black, Blue
Fingerprint scanner Yes, in home button Yes, rear
Screen-to-body ratio
81.8%
80.8%

Performance

Tests of Samsung Galaxy A03s and Oppo Realme C21 in the benchmarks
SoC
Chipset MediaTek Helio P35 MediaTek Helio G35
Max. clock 2350 MHz 2300 MHz
CPU cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4 cores at 1.8 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A53
- 4 cores at 1.8 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A53
Lithography process 12 nanometers 12 nanometers
Graphics IMG PowerVR GE8320 IMG PowerVR GE8320
GPU clock 680 MHz 680 MHz
FLOPS ~44.8 GFLOPS ~54.4 GFLOPS
Memory
RAM size 3, 4 GB 3, 4 GB
Memory type - LPDDR4X
Memory clock - 1866 MHz
Channels 2 2
Storage
Storage size 32, 64 GB 32, 64 GB
Storage type eMMC 5.1 eMMC 5.1
Memory card MicroSD MicroSD
Memory card max. size Up to 1024 GB Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core)
178
Geekbench 5 (Multi-Core)
Realme C21 +11%
989
AnTuTu Benchmark 9
120330
130716
CPU 36930 39772
GPU 15632 16631
Memory 29149 33664
UX 38919 41494
Total score 120330 130716

Software

Operating system Android 11 (Can be upgraded to Android 12) Android 10 (Can be upgraded to Android 11)
ROM One UI Core 4.1 Realme UI 2.0
OS size 13.2 GB -

Battery

Specifications
Capacity 5000 mAh 5000 mAh
Charge power 15 W 10 W
Battery type Li-Ion Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No Yes
Fast charging Yes (15% in 30 min) No
Full charging time 3:38 hr 2:55 hr
Battery life tests
Web browsing 15:57 hr -
Watching video 14:23 hr -
Gaming 06:16 hr -
Standby 124 hr -
General battery life
39:16 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/1.8
- 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
- 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/2.2
Focal length - 27 mm
Pixel size - 1.12 microns
Sensor type CMOS CMOS
Sensor size - 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 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, A2DP LE, HID, A2DP
USB type USB Type-C Micro USB
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- 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* 4 7
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio No Yes
Dolby Atmos Yes No
Speakers test
Max. loudness
86.5 dB

Other

Category Budget Budget
Announced August 2021 March 2021
Release date August 2021 March 2021
SAR (head) 0.36 W/kg -
SAR (body) 1.09 W/kg -
Sensors - Proximity sensor
- 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

If the software, battery life, camera, connectivity, design, and sound are more important to you, then choose the Samsung Galaxy A03s. But if the performance is more of a priority – go for the Oppo Realme C21.

Cast your vote

So, which phone would you choose?
16 (57.1%)
12 (42.9%)
Total votes: 28

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