Even though the design of the Galaxy A31 isn't exactly fresh for a budget Samsung device, I do like the fact that it's slim and light. The all-polycarbonate body feels quite sturdy but it does pick up fingerprints easily. Overall, the Galaxy A31 was comfortable to use on a daily basis during this review.
The Galaxy A31 has a sharp 6.4-inch full-HD+ (1080x2400 pixels) Super AMOLED display. I found it to be more than adequate in terms of brightness, even in the daytime. There's an in-display fingerprint sensor, which isn't very quick but works well as long as you give it a firm press.
Samsung has used the MediaTek Helio P65 octa-core SoC, and I would have no problem with it on a phone that costs Rs. 10,000, but I certainly don't expect it on something that costs above Rs. 20,000. Samsung's One UI v2.1, based on Android 10, also feels a bit sluggish overall.
The four cameras on the back include a primary 48-megapixel sensor, an 8-megapixel sensor with a wide-angle lens, a 5-megapixel depth camera, and a 5-megapixel macro camera. Overall, the cameras on the Galaxy A31 are very underwhelming and lack many features that you'd find in many phones that cost a lot less.
Samsung Galaxy A31 price in India starts from ₹ 18,999. The lowest price of Samsung Galaxy A31 is ₹ 18,999 at Flipkart on 28th December 2020.
Samsung Galaxy A31 Full Specifications
| Brand | Samsung |
| Model | Galaxy A31 |
| Launched | 24th March 2020 |
| Launched in India | Yes |
| Form factor | Touchscreen |
| Dimensions (mm) | 159.30 x 73.10 x 8.60 |
| Weight (g) | 185.00 |
| Battery capacity (mAh) | 5000 |
| Removable battery | No |
| Fast charging | Proprietary |
| Wireless charging | No |
| Colours | Prism Crush Black, Prism Crush Blue, Prism Crush White |
| Screen size (inches) | 6.40 |
| Touchscreen | Yes |
| Resolution | 1080x2400 pixels |
| Aspect ratio | 20:9 |
| Processor | 2GHz octa-core (2x2GHz + 6x1.7GHz) |
| Processor make | MediaTek Helio P65 |
| RAM | 6GB |
| Internal storage | 128GB |
| Expandable storage | Yes |
| Expandable storage type | microSD |
| Expandable storage up to (GB) | 512 |
| Rear camera | 48-megapixel (f/2.0) + 8-megapixel (f/2.2) + 5-megapixel (f/2.4) + 5-megapixel (f/2.4) |
| Rear autofocus | Yes |
| Rear flash | Yes |
| Front camera | 20-megapixel (f/2.2) |
| Operating system | Android 10 |
| Skin | One UI 2.1 |
| Wi-Fi | Yes |
| Wi-Fi standards supported | 802.11 a/b/g/n |
| GPS | Yes |
| Bluetooth | Yes |
| NFC | Yes |
| USB Type-C | Yes |
| Number of SIMs | 2 |
| SIM 1 |
| SIM Type | Nano-SIM |
| GSM/CDMA | GSM |
| 3G | Yes |
| 4G/ LTE | Yes |
| Supports 4G in India (Band 40) | Yes |
| SIM 2 |
| SIM Type | Nano-SIM |
| GSM/CDMA | GSM |
| 3G | Yes |
| 4G/ LTE | Yes |
| Supports 4G in India (Band 40) | Yes |
| Face unlock | Yes |
| In-Display Fingerprint Sensor | Yes |
| Compass/ Magnetometer | Yes |
| Proximity sensor | Yes |
| Accelerometer | Yes |
| Ambient light sensor | Yes |
