Do not touch the phone, disconnect the cable, or close the software during this time.

If a version is available, follow the prompts to download and install it. Manual Firmware Download (Flash Files)

If you need to flash manually, you will likely need to use a third-party site. When searching for these, look for the specific extension .nb0 or .pac .

Connect your phone using an original or high-quality USB data cable.

Follow these exact steps to flash the stock ROM file onto your Nokia C31: Step 1: Install the USB Drivers

Extract the downloaded SPD USB Drivers on your computer. Run the installer matching your OS architecture (x86 or x64) and follow the on-screen prompts to complete installation. Step 2: Extract Firmware and Tools