Once the interface opens, click on the located in the top-left corner.

Install a newer Android update or revert to a more stable older version.

While holding these buttons, connect the phone to your PC using the USB cable.

A repository for tested stock ROMs specifically for the Nokia C31.

Disconnect your phone and turn it on. The initial boot up may take up to 5-10 minutes. Troubleshooting Common Flashing Errors

Click the "Download" or "Flash" button in the tool.

Firmware (or Stock ROM) is the operating system designed by Nokia/HMD Global for your C31. Flashing this firmware replaces the current software.

Over time, corrupted system cache or bad updates can cause severe lagging, app crashes, or battery drain. A clean firmware installation wipes out these deeply embedded errors.

Flashing firmware carries risks. Follow these essential preparatory steps to avoid permanently damaging (hard-bricking) your smartphone:

Once you have downloaded the top-rated firmware package, the proper USB drivers, and the SPD Upgrade Tool, follow these steps precisely: Step 1: Install the Drivers and Extract Files

Because the Nokia C31 utilizes a Unisoc processor, standard flashing utilities like Mi Flash or SP Flash Tool will not work. You must download the (or SPD Upgrade Tool). 3. Unisoc/Spreadtrum USB Drivers

Resolves instances where the phone gets stuck on the Nokia logo during startup.

Release the buttons once the computer makes a connection sound and the tool registers the device port. Phase C: Executing the Flash