Nexus 6p The solution for locking back to wi Fi,
2 steps ;
One back up and rest your phone garatie it will work .
Two the easy way is down load wonder share and ,
Plug in and let it sync and it will some how reconfirm your home wifi IP connection,
I am not a teqnical guy but I run into this by a chance before returning my Nexus 6p, give it this chance and you night be happy rather than install a million apps they do not work.
G.H.