Hi
The settings should have updated in your phone on inserting the SIM card.
Is mobile data turned on in your iPhone under Settings-Mobile/Cellular-Mobile Data.
However this is a good help page that gores through your APN Settings for data usage on Vodaphone
http://www.geeksquad.co.uk/articles/vodafone-apn-settingsIs their a 3G or 4G symbol in the status bar of your iPhone at the top ?
If no help then contact Vodaphone to have your account checked.
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Current Phone >
Samsung Galaxy s²⁴ Ultra 512gb.