| Technology | GSM / CDMA / HSPA / EVDO / LTE / 5G |
| 5G | Yes |
| Dimensions | 151.7 x 71.2 x 7.9 mm |
| Weight | 169 g |
| Build | Gorilla Glass Victus front, plastic back, aluminum frame |
| SIM | Nano-SIM + eSIM |
| Protection | IP68 dust and water resistant |
| Size | 6.2 inches |
| Resolution | 1080 x 2400 pixels |
| Type | Dynamic AMOLED 2X |
| Refresh Rate | 48-120Hz Adaptive |
| Brightness | 1300 nits peak |
| Protection | Corning Gorilla Glass Victus |
| OS | Android 11, One UI 3.1 (Upgradeable to Android 15) |
| Chipset | Qualcomm Snapdragon 888 5G (US/China) / Exynos 2100 (Global) |
| CPU | Octa-core |
| GPU | Adreno 660 / Mali-G78 MP14 |
| RAM | 8 GB |
| Storage | 128GB / 256GB |
| Card Slot | No |
| Main | 12 MP, OIS |
| Telephoto | 64 MP, Hybrid 3x Zoom |
| Ultrawide | 12 MP |
| Front | 10 MP Dual Pixel AF |
| Capacity | 4000 mAh |
| Wired Charging | 25W |
| Wireless | 15W |
| Reverse Charging | Wireless PowerShare |
| Wi-Fi | Wi-Fi 6 |
| Bluetooth | 5.0 |
| NFC | Yes |
| USB | USB Type-C 3.2 |
| Fingerprint | Ultrasonic Under-display |
| Speakers | Stereo Speakers tuned by AKG |
The Samsung Galaxy S21 5G delivers flagship performance in a compact form factor. It features a 6.2-inch Dynamic AMOLED 2X display with a smooth adaptive 120Hz refresh rate, the Snapdragon 888 or Exynos 2100 chipset depending on the region, and a versatile triple-camera system capable of capturing excellent photos and videos. Wireless charging, IP68 durability, stereo speakers, and years of software updates make the Galaxy S21 a strong flagship even today.
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