The phone is powered by Mediatek Octa-core 2.2 GHz Cortex-A53 processor. The smartphone runs on Android 13 operating system and the device comes with a 6.6 inches IPS LCD capacitive touchscreen and 720 x 1612 pixels resolution.

The rear camera consists of 50 MP (wide) + 0.08 MP (auxiliary lens) camera lenses that allow you to enable Dual-LED flash. The front camera has a 8 MP sensor with a LED flash. The sensors available in the device include side-mounted fingerprint, compass, and accelerometer. The dimension of the smartphone is 163.7 x 75.6 x 8.6 mm.

The smartphone is fueled by a non-removable Li-Ion 5000 mAh battery + 18W wired. Tecno Spark 20C comes in different colors such as Mystery White, Alpenglow Gold, Magic Skin, and Gravity Black. It features USB Type-C, OTG, FM radio, GPS, and Bluetooth. The device is packed with 4 GB, 8 GB RAM and 128 GB internal storage.