The same problem here. Overnight my phone decided to turn bluetooth and wifi off. I was not able to turn them back on exactly the same way as other users above mentioned. I have restarted/rebooted, took battery out, did a safe mode check, nothing changed. Backed up my files and made a factory reset. No fix from this either. On top of all to recover all settings I've backed up before, my phone requires WIFI which obviously I can not turn on... That's what I call a total screw-up.
I am not comfortable with the idea to take my phone apart as not much video shows how to put it back together and with that for sure I would lose my warranty. Any ideas what else I should try before I trun my phone in to a shop?
/Problem is the phone was bought in another country to where I am not able to return it as I have moved since, and there are not any main Samsung shops around in Andalusia nor in Gibraltar where I could easily turn, so I would prefer any home fixes before doing that/