How do stop someone I live with from hacking my devices?

[Ladysovereign Sanctified]

Today I observed my roommate holding my powerd down device, (which by the way is brand new) and holding it together with his own trying to steel my data. How can I preview what he's done already to my other devices, and prevent such a reaccurence?

 

[Aquila]

Please use your original thread.

 

[Golfdriver97]

Link to other thread: https://forums.androidcentral.com/a...mmates-hacking-my-new-device-help-please.html