My Internet only works when I'm connected to my homes Wi-Fi?

IPhone 4S vodaphone connects but doesn't load and says I'm not subscribed to a mobile data service even tho I get 500mb of data

Ring them up ask them what's going on

Do you have the correct settings for data access? Check on Vodaphone's website & hopefully there should be a way to sms the settings to your phone, just follow the instructions - usually to just choose save settings to phone.
Here's what I've found:
Pay monthly / Business
APN: wap.vodafone.co.uk
Username: wap
Password: wap
Pay as you go
APN: pp.vodafone.co.uk
Username: wap
Password: wap
iPhone
If you have an iPhone you'll need to connect over Wi-Fi to get your settings by text, or you can enter them manually. To do this, go to:
Settings > General > Network > Mobile Data Network

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