Download the RUU zip file. You will need to identify the correct 0P6BIMG.zip or 2PS6IMG.zip (depending on the model) 1.2.3. Format SD Card: Format a MicroSD card to FAT32.

Boot your phone into or Download mode (depending on the model age) and connect it to the PC.

by completely overwriting the phone's internal storage and software partitions with an official factory image. Australian Broadcasting Corporation Key Functions and Use Cases Factory Restoration

An RUU is a Windows executable program ( .exe ) that contains a complete firmware package for a specific HTC device. It acts as an interface between the host computer and the device’s bootloader.

| Item | Spec | |------|------| | OS | Windows 7+ (64-bit recommended), macOS 10.13+, or Linux (fastboot) | | USB | Data cable (not charge-only) | | Drivers | HTC USB drivers installed | | Device | Bootloader locked or unlocked (RUU works with both, but locked is safer) | | Battery | >30% |

Rename the downloaded RUU zip file to match the specific structural filename required by your phone model (e.g., 0PJAIMG.zip for the HTC One M9, or 2PS6IMG.zip for the HTC 10).