TCL 20 SE smartphone was launched on 12th January 2021. The phone comes with a 6.82-inch touchscreen display with a resolution of 720x1640 pixels at a pixel density of 263 pixels per inch (ppi) and an aspect ratio of 20:9. TCL 20 SE is powered by an octa-core Qualcomm Snapdragon 460 processor. It comes with 4GB of RAM. The TCL 20 SE runs Android 11 and is powered by a 5000mAh battery. The TCL 20 SE supports Quick Charge 4.0 fast charging.

As far as the cameras are concerned, the TCL 20 SE on the rear packs a 16-megapixel primary camera with an f/2.0 aperture; a second 5-megapixel camera with an f/2.2 aperture; a third 2-megapixel camera with an f/2.4 aperture and a fourth 2-megapixel camera with an f/2.4 aperture. The rear camera setup has autofocus. It sports a 8-megapixel camera on the front for selfies, with an f/2.0 aperture.

The TCL 20 SE runs TCL UI based on Android 11 and packs 64GB of inbuilt storage that can be expanded via microSD card (up to 256GB). The TCL 20 SE is a dual-SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM cards. The TCL 20 SE measures 172.08 x 77.14 x 9.10mm (height x width x thickness) and weighs 206.00 grams. It was launched in Aurora Green and Buit Black colours.

Connectivity options on the TCL 20 SE include Wi-Fi 802.11 a/b/n/ac, GPS, Bluetooth v5.10, 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, gyroscope, proximity sensor, and fingerprint sensor.