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I am asking in help of a friend, so some information i may be unable to provide.
Everytime they go to lock the phone, a video automatically plays, on a continous loop, until the phone is unlocked. The video seems like an introductory video to the phone, that might be used in a shop to advertise the phone and it's features. The phone recently had the screen replaced and this has been happening ever since. I was wondering if there are any settings that coudl cause this to happen? It automatically switches on bluetooth, mobile data and NFC. I was thinking it was some sort of factory setting it is currently set in. The phone previously worked fine, like a normal phone, before the screen had been replaced, so any reasons this might have caused this would be helpful.
Looks like on your mobile Demo mode is turned on. Try disabling it.