Whenever I cross from Northern Ireland into the Republic of Ireland, my mobile data stops working. It shows as connected to Vodafone IE 4G but I can’t access any websites. I am using an iPhone 6S with iOS 12 but this problem has always happened regardless of software version.
No I am a Vodafone UK customer but the Republic is a roam-free location meaning my calls/texts/data should just work when I cross over. I always get a text from Vodafone saying this when I cross the border. Calls/texts work fine but the internet does not work at all.
As Cookie has advised, you would need to contact Vodafone UK directly to query this further.
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