mobile

Yesterday I got the OTA lollipop update which I installed straight away. Had a play around with it and everything seemed fine.... Until I tried to use Wi-Fi tether to my Z2 tablet. It says that my tablet is connected but I am unable to use the internet. I then tried factory resetting it to see if that solved the problem but still no internet. Then today my Z2 tablet got the update so I installed that hoping that it might sort out the tethering problem but it's still the same. My Z2 phone is a D6503 and I'm in the UK. Has anyone else had this problem?. Is there any solution?.

Thanks in advance

Scotty.