Factory-reset your Android phone without losing access or essential data

A reset wipes personal data and can trigger account-protection checks. Back up what matters, prepare your passwords and follow the right steps for your device before erasing it.

A factory reset returns an Android device to its original software state and is usually reserved for cases where a phone is badly misbehaving, needs to be passed on, or must be wiped before resale. Google advises trying simpler troubleshooting first if a handset is slow, including restarting it, checking for updates, freeing storage and reviewing troublesome apps. A reset should be treated as a last resort, not an early fix.

Preparation matters. Google and Samsung both warn that a reset removes personal data, so users should back up photos, contacts, messages, files and any other important content before proceeding. Google says eligible information can often be restored from a Google Account backup, although not every app or item is necessarily included. It also recommends checking which data is covered by the backup process, as results can vary by device and Android version.

It is also wise to make sure the phone is charged, or connected to power, before starting. Users should know the Google Account and password that were previously linked to the device, because Android’s theft-protection systems can require that information after the wipe. Samsung notes that screen-lock credentials and a Samsung Account password may also be needed on Galaxy devices. For added caution, many guides recommend removing Google and manufacturer accounts first, then taking out the SIM card and memory card before wiping the handset.

The exact menu path depends on the brand and software version, but the standard route on many Android phones is through Settings, then System, then Reset options, and finally Erase all data or Factory data reset. On Samsung devices, the path is typically Settings, General management, Reset, then Factory data reset. Google and Samsung both say the device will show a list of what will be erased and then ask for confirmation before the process begins. Once complete, the phone restarts and displays the initial setup screen.

After the reset, users can sign in again and restore an available backup during setup. Google says some data can be brought back automatically, while other content may need to be reinstalled or copied separately. If the device is being sold, the reset should be the final step after accounts have been removed. Google’s account-removal guidance is intended to reduce the risk of activation locks or other protection features leaving the next owner unable to use the phone.