After my last upgrade, I realised that my GPS was broken. I eventually found a fix using this page. In short, if it happens to you, type *#*#3214789650#*#* then go to SUPL / CP Settings and select FQDN Type / AUTO Config. Reboot the phone and that should be it. My other settings were identical so as your mileage may vary, you are invited to check all of them. Usual disclaimer applies (you should know what you’re doing)