Samsung Galaxy A40 vs Galaxy S21 5G

Specs compared side by side, measured on real phones shared by owners with the Device Info app.

Samsung Galaxy A40Samsung Galaxy A40Exynos 7904Change
Samsung Galaxy S21 5GSamsung Galaxy S21 5GExynos 2100Change

Key differences

  1. Chipset: the Galaxy A40 uses the Exynos 7904 (14 nm), the Galaxy S21 5G the Exynos 2100 (5 nm Samsung). The Galaxy A40's fastest core runs at 1.77 GHz, the Galaxy S21 5G's at 2.91 GHz.
  2. Screen: 5.9 inches on the Galaxy A40, 6.2 inches on the Galaxy S21 5G. Up to 60 Hz on the Galaxy A40, 120 Hz on the Galaxy S21 5G.
  3. Battery: 3,020 mAh on the Galaxy A40, 3,880 mAh on the Galaxy S21 5G.
  4. Main camera: 15.9 MP on the Galaxy A40, 12.2 MP on the Galaxy S21 5G.

The same on both: Wi-Fi 6, NFC and Widevine L1.

Chipset

Chipset
Exynos 7904Exynos 2100
Process
14 nm5 nm Samsung
CPU
2× 1.77 GHz Cortex-A73
6× 1.59 GHz Cortex-A531× 2.91 GHz Cortex-X1
3× 2.81 GHz Cortex-A78
4× 2.21 GHz Cortex-A55
Top CPU speed
1.77 GHz2.91 GHz
CPU cores
88
GPU
Mali-G71Mali-G78

Memory

Versions seen
4GB | 64GB8GB | 128GB
RAM type
LPDDR4LPDDR5

Display

Size
5.9 in6.2 in
Resolution
1080 × 23401080 × 2400
Pixel density
439 ppi423 ppi
Refresh rates
60 Hz120 Hzalso 48, 60, 96
HDR
—HDR10, HDR10+, HLG

Battery

Capacity
3,020 mAh3,880 mAh

Cameras

Back camera 1
15.9 MP4608 × 3456 · f/1.7 · 3.92 mm · OIS12.2 MP4032 × 3024 · f/1.8 · 5.4 mm · OIS
Back camera 2
—12.2 MP4032 × 3024 · f/2.2 · 2.2 mm
Front camera 1
24.8 MP5760 × 4312 · f/2 · 3.75 mm10 MP3648 × 2736 · f/2.2 · 3.3 mm
Front camera 2
16.5 MP4688 × 3516 · f/2 · 3.75 mm7.1 MP3216 × 2208 · f/2.2 · 3.3 mm

Megapixels are what Android reports to apps. Many phones combine pixels by default, so the advertised megapixels can be higher.

Connectivity

Wi-Fi
Wi-Fi 6Wi-Fi 6
6 GHz Wi-Fi
NoNo
Bluetooth LE Audio
—No
NFC
YesYes
UWB
NoNo
USB host
YesYes

Software

Android
Android 11Android 15
UI
—One UI 7.0
Released with
Android 9Android 11
Widevine DRM
L1L1

Sensors

Sensors
26 sensors44 sensors
Galaxy A40 full specs Galaxy S21 5G full specs

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From phones shared with the Device Info app · updated October 2026 Hardware specs only. No personal data. Privacy