Cannot get on internet via 3G/4g

[Anonymous]

I have an iPhone 4. I have checked via my O2 account and included in my monthly allowance/tariff is 100mb of data a month. However if I switch off wifi, or have no wifi access I CANNOT get on the internet via 3G or 4g :-(. The phone comes up with the following message whenever I try to connect "could not activate cellular data network" "You are not subscribed to a cellular data service". Please help me 🙂

[MI5 · Accepted solution]

Check you have 3g enabled in settings and then reset your network connections.
Manual settings here if you need them http://community.o2.co.uk/t5/Apple-iOS-Devices-iPhone-iPad/Connecting-iPhone-to-Data-Services/m-p/54...

[jonsie]

Alternatively text ACTIVE to 2020, save the settings and reboot the phone.

you also need to check in My O2 that you have the idata bolt on.

[Bambino]

You will not be able to get 4G on an iPhone 4.