Background — why smartphones show this error

This erases everything. Back up your data to OneDrive first. Go to Settings . Tap System and then About . Scroll down and tap Reset your phone . Confirm by tapping Yes .

Developer and IT-level analysis (for repeated/systemic issues)

If a standard reset fails, flashing the original firmware using a PC will completely rebuild the partition table of your Lumia 650.

High-quality cables are crucial for emergency flashing.

thor2 -mode emergency -hexfile "C:\ProgramData\Microsoft\Packages\Lumia650\emergency\*.hex" -mbnfile "C:\ProgramData\Microsoft\Packages\Lumia650\emergency\*.mbn" -orig_gpt

Grab the latest version of . This is the most reliable third-party software designed to flash emergency files and unlock bootloaders. It acts as a user-friendly interface for the command-line tools. Create a dedicated folder on your desktop (e.g., C:\Lumia650_Recovery ) to store all your files.