Phone flashing** refers to the process of installing or replacing the firmware (operating system) on a mobile device. This can involve:
- Upgrading to a newer version of Android or iOS
- Downgrading to an earlier version
- Installing custom ROMs (e.g., LineageOS, Pixel Experience)
- Restoring a bricked or malfunctioning device
Flashing typically requires tools like Odin (for Samsung), SP Flash Tool (for MediaTek), or Fastboot (for many Android devices), and may involve unlocking the bootloader. It can erase data and void warranties if not done properly.