Help Note 3 automatically forgets networks?

[FlameTsubasa]

I bought my Galaxy Note 3 a few months ago and recently and just today my phone automatically forgets my registered networks and I have to register again, I had an iPhone 3 before and I always leave my 4G on because I don't really waste data like some phones do. But recently I was at home and my phone forgot my home network and I downloaded a large file that was bigger than my 4G data allowance and got a text after I finished downloading that I had went over costing me over 300 dollars.

Can anyone help me with this problem so this doesn't happen again?

EDIT: Before I downloaded the file I also used a personal hotspot for some friends to connect to then turn off, and then today I connected to my friends hotspot and when I got home it forgot my network again, is this why it automatically forgets my networks?

 

[dontpanicbobby]

Welcome to the Android Forums FlameTsubasa. Sounds like you could use a factory reset. A factory reset will place your device into the same condition as when it was fresh from the factory. Then as you re-install your apps try to keep track of what he last one was before you encounter this problem again. Then uninstall it and find a substitute for that app. I'm guessing you had or have a conflicting app issue. But honestly I've never run across this issue before so I really am guessing here.

 

[nickdalzell]

Looks more like the 'your Internet connection is unstable' bug rearing it's head.

Go to settings, WiFi, hit menu button, tap advanced, turn off 'auto network switch'.