Yesterday my wifi decided to drop out, for no apparent reason. I'm on holiday and it was working fine. It auto reconnected to the network (remembering the details from when we were here last time). Everybody else's devices are connected fine.
I've tried everything I can think of, including; forgetting network and reconnecting by entering correct password; resetting network settings; soft reboot; tweaking aeroplane mode and power saving mode; starting phone in safe mode.
I haven't tried throwing my phone at the wall yet, although I'm pretty close!