manually.
Use 24-hour format: Enable this for the
system time to be in the 24-hour format or
disable it to use the 12-hour format.
Backup
Enable to back up to Google Drive.
Reset options
In Reset options, you can reset settings, reset
app preferences, and erase all data (factory
reset).
Reset Wi-Fi, mobile & Bluetooth: You can
reset all network settings, including Wi-Fi,
mobile data and Bluetooth.
Reset app preferences:
This will reset all preferences for:
Disabled apps.
Disabled app notifications.
Default applications for actions.
Background date restrictions for apps.
Any permission restrictions.
You will not lose any app data.
Erase all data (factory reset): Refer to
"Factory reset" for more information.