Samsung Galaxy A31 smartphone was launched on 24th March 2020. The phone comes with a 6.40-inch touchscreen display with a resolution of 1080×2400 pixels and an aspect ratio of 20:9. Samsung Galaxy A31 is powered by a 2GHz octa-core MediaTek Helio P65 processor that features 2 cores clocked at 2GHz and 6 cores clocked at 1.7GHz. It comes with 6GB of RAM. The Samsung Galaxy A31 runs Android 10 and is powered by a 5000mAh non-removable battery. The Samsung Galaxy A31 supports proprietary fast charging.

As far as the cameras are concerned, the Samsung Galaxy A31 on the rear packs a 48-megapixel primary camera with an f/2.0 aperture; a second 8-megapixel camera with an f/2.2 aperture; a third 5-megapixel camera with an f/2.4 aperture and a fourth 5-megapixel camera with an f/2.4 aperture. The rear camera setup has autofocus. It sports a 20-megapixel camera on the front for selfies, with an f/2.2 aperture.

The Samsung Galaxy A31 runs One UI 2.1 based on Android 10 and packs 128GB of inbuilt storage that can be expanded via microSD card (up to 512GB). The Samsung Galaxy A31 is a dual-SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM cards. The Samsung Galaxy A31 measures 159.30 x 73.10 x 8.60mm (height x width x thickness) and weighs 185.00 grams. It was launched in Prism Crush Black, Prism Crush Blue, and Prism Crush White colours.

Connectivity options on the Samsung Galaxy A31 include Wi-Fi 802.11 a/b/g/n, GPS, NFC, USB Type-C, 3G, and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include accelerometer, ambient light sensor, compass/ magnetometer, proximity sensor, and in-display fingerprint sensor. The Samsung Galaxy A31 supports face unlock.