Factory reset
Your device may start acting strange and having various performance issues (working too slow, showing too many errors, certain apps or features not working). In case you cannot resolve these issues by restarting the device and/or clearing the cache, running an antivirus or antimalware check or updating your device software, drivers or operating system , a factory reset might be a solution.
Be aware that If you run a factory reset on your phone all the data will be lost, so make sure to backup any important data before proceeding. See more information from Google on how to do a factory reset on Android devices or Apple’s support page on how to do the same on iOS based devices.
Phone/Tablet Computer/Laptop Device reset