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Hi, I have a Galaxy A20 with a new Vodafone account. It is a tourist SIM I bought in Hungary and it has been having trouble with calls, texts, and data. I have never been able to make a call, it randomly can send texts, and no longer uses data once I crossed into Serbia. Anyone have an idea of whats going on?
The problem you are going to have is Vodafone UK don't have any access to Vodafone Hungary accounts. Vodafone Hungary is a separate network and company.
You are going to need to take this up with your service provider, Vodafone Hungary here: https://www.vodafone.hu/english/contact-us