| Brand | Nokia |
| Model | G21 |
| Connectivity | |
| Network | 2G, 3G, 4G |
| SIM | Dual Nano SIM |
| WLAN | dual-band, Wi-Fi Direct, Wi-Fi hotspot |
| Bluetooth | v5.0, A2DP, LE |
| GPS | A-GPS, GLONASS, GALILEO |
| Radio | FM, RDS |
| USB | v2.0 |
| OTG | Yes |
| USB Type-C | Yes |
| NFC | (Market dependent) |
| Body | |
| Style | Minimal Notch |
| Material | Glass front, plastic body |
| Water Resistance | No |
| Dimensions | 164.6 x 75.9 x 8.5 millimeters |
| Weight | 190 grams |
| Display | |
| Size | 6.5 inches |
| Resolution | HD+ 720 x 1600 pixels (270 ppi) |
| Technology | IPS LCD Touchscreen |
| Protection | No |
| Features | Multitouch |
| Back Camera | |
| Resolution | Triple 50+2+2 Megapixel |
| Features | PDAF, f/1.8, 1/2.76″, 0.64µm, depth, macro, LED flash & more |
| Video Recording | Full HD (1080p) |
| Front Camera | |
| Resolution | 8 Megapixel |
| Features | F/2.0 aperture |
| Video Recording | Full HD (1080p) |
| Battery | |
| Type and Capacity | Lithium-ion 5050 mAh (non-removable) |
| Fast Charging | 18W Fast Charging – USB Power Delivery 3.0 |
| Performance | |
| Operating System | Android 11 |
| Chipset | Unisoc T606 (12 nm) |
| RAM | 4 GB |
| Processor | Octa-core, up to 1.6 GHz |
| GPU | Mali-G57 MP1 |
| Storage | |
| ROM | 64 GB (eMMC 5.1) |
| MicroSD Slot | Dedicated slot |
| Sound | |
| 3.5mm Jack | Yes |
| Features | Loudspeaker |
| Security | |
| Fingerprint | Side-mounted |
| Face Unlock | Yes |
| Others | |
| Sensors | Fingerprint, Accelerometer, Proximity |
| Manufactured by | Nokia |
| Made in | Bangladesh |