| Hardware and OS | Samsung Galaxy A81 | |
| Operating system | Android v9.0 (Pie) | |
| Processor | Octa core (2.2 GHz, Dual core, Kryo 470 1.8 GHz, Hexa Core, Kryo 470) | |
| Chipset | Qualcomm Snapdragon 730G | |
| Internal Storage | 128 GB | |
| GPU | Adreno 618 | |
| RAM | 8 GB | |
| Camera | Samsung Galaxy A81 | other phones |
| Main camera | 48 MP 10 MP | |
| Autofocus | Yes, Phase Detection autofocus | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Image | 8000 x 6000 Pixels | |
| Flash | Yes, LED Flash | |
| Front camera | 48 MP 10 MP | |
| Front camera resolution | 48 MP Primary Camera, 10 MP Camera | |
| Video recording | Yes | |
| Connectivity | Samsung Galaxy A81 | other phones |
| Bluetooth | Yes, v5.0 | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| Dual SIM | Dual SIM, GSM GSM | |
| GPS | Yes, with A-GPS, Glonass | |
| Network support | 4G , 3G, 2G | |
| NFC | Yes | |
| USB connectivity | Mass storage device, USB charging | |
| USB TYPE-C | Yes | |
| WI-FI | Yes, Wi-Fi 802.11, b/g/n | |
| Multimedia | Samsung Galaxy A81 | other phones |
| Audio jack | 3.5 MM | |
| Loudspeaker | Yes | |
| Battery | Samsung Galaxy A81 | other phones |
| Capacity | 4000 mAh | |
| Type | Li-ion | |
| User replaceable | No | |
| Quick charging | Yes, Fast | |
| Design | Samsung Galaxy A81 | other phones |
| Colors | Black | |
| Features | Samsung Galaxy A81 | other phones |
| Fingerprint sensor position | On-Screen | |
| Fingerprint sensor | Yes | |
| Other sensors | Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope | |
