Create a temporary guest profile for sharing your phone with someone.
If you need a space for someone to use on a regular basis, where apps and data can be saved, add a user instead of a guest session.

Before you add the guest, adjust settings:

To allow the guest to make calls, turn Allow guest to use phone on 
The guest will be able to see your call history if you turn this on.

Tap Exit guest.
If you switched off Delete guest activity before the session, you’ll be asked if you want to delete or save data when exiting the session.
Otherwise, any data from and apps installed during this session is deleted.
Or:
To end the session: