Samsung Galaxy A55 5G vs Galaxy S21 5G

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

Samsung Galaxy A55 5GSamsung Galaxy A55 5GExynos 1480Change
Samsung Galaxy S21 5GSamsung Galaxy S21 5GExynos 2100Change

Key differences

  1. Chipset: the Galaxy A55 5G uses the Exynos 1480 (4 nm Samsung), the Galaxy S21 5G the Exynos 2100 (5 nm Samsung). The Galaxy A55 5G's fastest core runs at 2.75 GHz, the Galaxy S21 5G's at 2.91 GHz.
  2. Screen: 6.6 inches on the Galaxy A55 5G, 6.2 inches on the Galaxy S21 5G. Both run at up to 120 Hz.
  3. Battery: 4,905 mAh on the Galaxy A55 5G, 3,880 mAh on the Galaxy S21 5G.
  4. Main camera: 12.5 MP on the Galaxy A55 5G, 12.2 MP on the Galaxy S21 5G.

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

Chipset

Chipset
Exynos 1480Exynos 2100
Process
4 nm Samsung5 nm Samsung
CPU
4× 2.75 GHz Cortex-A78
4× 2.05 GHz Cortex-A551× 2.91 GHz Cortex-X1
3× 2.81 GHz Cortex-A78
4× 2.21 GHz Cortex-A55
Top CPU speed
2.75 GHz2.91 GHz
CPU cores
88
GPU
ANGLE ((Samsung Xclipse 530) on Vulkan 1.3.279)Mali-G78

Memory

Versions seen
8GB | 128GB
8GB | 256GB
12GB | 256GB8GB | 128GB
RAM type
LPDDR5LPDDR5
Storage type
UFS 3.1—

Display

Size
6.6 in6.2 in
Resolution
1080 × 23401080 × 2400
Pixel density
388 ppi423 ppi
Refresh rates
120 Hzalso 60120 Hzalso 48, 60, 96
HDR
HDR10, HDR10+, HLGHDR10, HDR10+, HLG

Battery

Capacity
4,905 mAh3,880 mAh

Cameras

Back camera 1
12.5 MP4080 × 3060 · f/1.8 · 5.54 mm · OIS12.2 MP4032 × 3024 · f/1.8 · 5.4 mm · OIS
Back camera 2
12 MP4000 × 3000 · f/2.2 · 1.74 mm12.2 MP4032 × 3024 · f/2.2 · 2.2 mm
Front camera 1
8 MP3264 × 2448 · f/2.2 · 3.72 mm10 MP3648 × 2736 · f/2.2 · 3.3 mm
Front camera 2
5.7 MP2880 × 1980 · f/2.2 · 3.72 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
YesNo
NFC
YesYes
UWB
NoNo
USB host
YesYes

Software

Android
Android 15–16Android 15
UI
One UI 8.5One UI 7.0
Released with
Android 14Android 11
Widevine DRM
L1L1

Sensors

Sensors
35 sensors44 sensors
Galaxy A55 5G 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