Since upgrading my iPhone 5 to ios 7, I cannot get the internet, email to work on 3g. I get the message ""could not activate mobile data network. You are not subscribed to a mobile data service". How do I fix it?

Since upgrading my iPhone 5 to ios 7, I cannot get the internet, email to work on 3g. I get the message ""could not activate mobile data network. You are not subscribed to a mobile data service". How do I fix it?
I've contacted o2, tried all of their suggested updates and changes, reset my phone 3 times and still no luck.
Any help appreciated.
Thanks,
Louisa

Hi, l have the same problem, were you able to resolve?

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Since upgrading my iPhone 5 to ios 7, I cannot get the internet, email to work on 3g. I get the message ""could not activate mobile data network. You are not subscribed to a mobile data service". How do I fix it?

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