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@annnelau wrote:
I've got unlimited Internet and it was fine yesterday but it won't let me go in 3G now? I've got an iPhone but all the settings are right? Help
Check to see if there are any outages in the mobile network where you are by entering your postcode Here
If OK then, see if doing a manual roam helps Here
And maybe worth trying removing your simcard from your phone then put it back in, and restart REBOOT your phone