Hello after update restart item if no luck then put in these APN settings https://community.giffgaff.com/t5/Settings-for-your-device/Internet-and-MMS-settings-APN-guide/ta-p/...
Anyone got any ideas? I have restarted my iPad several times without success. No choice but to leave GiffGaff I suppose
@johnashleywebb; can you assert the APN settings have been configured?
There was a post within the past couple of days by someone affected by this with a Windows Phone and (from memory) the PAP authentication had been set when it ought not to have been.
Weaseling out of things is important to learn. It's what separates us from the animals ... except the weasel. - Homer Simpson
Have a look here,
Seems to be quite a common problem with Iphone updates :/