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any time, you can enable automatic backup to Google Drive 
of important data. You need to sign in to your Google 
account to use this feature. 
Reset Options 
Open Settings and touch System > Advanced > Reset 
options to reset network settings, app preferences, or the 
phone to factory default status. 
Multiple Users 
Open Settings and touch System > Advanced > Multiple 
users to manage the user accounts of your phone. 
You can share your phone with other people by creating 
additional user accounts. Each user with a separate account 
has his/her own storage space, wallpaper, screen lock and 
so on. Users can also adjust phone settings like Wi-Fi that 
affect everyone and update apps for all other users. 
By default, a Guest account is available for anyone who 
needs to use your phone temporarily. You can touch Add 
user to create more user accounts. 
If you want users to add more users when the phone is 
locked, switch on Add users from lock screen. Anyone can 
then open the Quick Settings panel from the lock screen and 
touch        > Add user to create new user accounts. 
  NOTES: 
  Touch    next to an account to configure its options.