If you are selling or giving away your Xperia 10 Plus, perform the hard reset via the Settings menu , as this properly removes your Google account. If you use the hardware key method before removing your Google account, the next user will be locked out by FRP. Always go to Settings > Accounts > Google > Remove account before resetting a device you plan to sell.
The first boot after this forced reset can take 10–15 minutes. Do not press any buttons. The phone will eventually boot to the setup screen as if it were new. How to Hard Reset SONY Xperia 10 Plus
Use this method if you still have access to your phone’s interface. How to Hard Reset SONY Xperia 10 VI via Recovery Mode If you are selling or giving away your
If your buttons are broken or the standard Hard Reset fails, Sony offers a software tool for Windows and macOS called . This is an official method to repair the software on your device. The first boot after this forced reset can
If you can still access your phone’s menus and you simply want to wipe the device to clean it up, this is the easiest method. This is technically a "Factory Reset" rather than a "Hard Reset" (which implies using hardware buttons), but the result is the same.