My 6 keeps dropping my wifi and I have to kee entering in the wifi password in order to reconnect. It won't remember the network nor stay connected. I've tried changing channels on my router, forgetting the netowork and resetting the network, I've entered the wifi in on my phone manually. Nothing seems to work.
I haven't had to connect with any other wifi network, so as far as I know it's just with this one network. Yes there are two other phones connected to the same network along with a tablet and laptop. It's been going on since I bought the phone almost 2 weeks ago.
Sent from my iPhone
OK. I see you have tried changing the channel on your router too, and forgetting and reconnecting.
Try connecting to someone else's router.
Go to a corporate store and show them the behavior.
You may need a new unit. Did it have the previous iOS version on it and worked OK? Maybe it needs a reset (not sure how that is done on an Apple). Sorry I couldn't suggest something easy that helped.