If you don't see it there, check under About Phone . Method 2: Manual Upgrade via PC
To flash the TCL 502, you will need to download a specific toolset to your Windows PC: Firmware TCL 502
Software responsible for managing cellular connections, Wi-Fi, and Bluetooth. Why You Might Need to Flash Your Firmware If you don't see it there, check under About Phone
Make sure you have downloaded all necessary files and tools onto your Windows PC before proceeding: If you don't see it there