Samsung
Reset All Settings auf Samsung
Resetting all settings on a Samsung phone brings sound, display, keyboard, language, and security options back to their factory state. Apps, photos, contacts, and other personal content stay exactly where they are. This is different from a full factory reset, which wipes the entire device.
Use this option when a setting you changed earlier is causing problems and you cannot remember which one it was. It is also useful before selling a phone in a limited way, though a full factory reset is still recommended for that purpose since app data and accounts are not removed here.
To reset all settings, open Tap on Settings ➔ Tap on General management ➔ Tap on Reset ➔ Tap on Reset all settings ➔ Tap on Reset settings ➔ Tap on Reset. Confirm the action when prompted.
After the reset, security settings such as app permissions and lock screen preferences return to their defaults, so some apps may ask for permissions again. Sound profiles, keyboard dictionaries you added manually, and language preferences also reset. If the goal is to remove everything before handing the device to someone else, choose a factory reset instead.