Thanks for the replies.
Managed to bypass the lock out between phone and google during start up. I had two step notification on in google and i think, maybe part of the problem. So turned off logged in with another email (forget about drive backup) and managed to get the phone to start up correctly.
The lock out/phone booting after clearing is definitely linked with google and two step verification in my case at least.
Still not sure why the gps/wifi dropping issue happened leading me to requiring a reboot, but does anyone know what is the latest wireless update for? sure dont want to lose the screen slide function but if i have too for stability then so be it.