No cellular data since ios7 update

[Anonymous]

Since I downloaded ios7 on my iPhone 5 I have not been able to access the internet at all when I am away from a wifi connection. Even when my phone says I have a 3G connection and I try to access my emails or anything on the internet- it says no internet connection. Before the update it worked fine. Any suggestions as to how this can be fixed? Thanks

[freewilll]

I had this error:

could not activate cellular network
you are not subscribed to a cellular data service

when roaming in France and Belgium. I tried long and hard to fix this but had been stumped for years to the point of coming close to wanting to leave O2.

And then I finally tried using mobile.o2.co.uk on my SIM only contract for cellular data... and it worked :).

1 Go to settings -> cellular -> cellular data options -> cellular data network -> CELLULAR DATAsettings -> cellular -> cellular data options -> cellular data network
2. In CELLULAR DATA, change idata.o2.co.uk to mobile.o2.co.uk
3. Reboot phone

I think it might have something to do with this: https://community.o2.co.uk/t5/Apple-iOS-Devices-iPhone-iPad/using-iPhone-on-non-iPhone-tariff/td-p/9...

since my original phone was on android and I upgraded to an iPhone at one point.

This has been annoying me for years and never had internet in some european countries, until now in Belgium.

[MI5]

You are on the wrong data tariff.
You need to call customer service and ask to be put onto idata for iPhone.

[jonsie]

At the moment every time you reboot the phone the tariff will alter. It's been a known problem on here for years. Usually a combination of incorrect bolt on and APN resulting in the incorrect bolt on of BlackBerry as standard data.