Mobile phones whilst at the ring

Might be usefull to you if your on Vodafone
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What is Vodafone Passport and how does it work?

Opt in to Vodafone Passport and you can call the UK from over 35 European countries – as well as Australia and New Zealand – paying your standard home rate.
Whenever you make a call back to the UK, or within the country you're visiting, there's a 75p connection charge. Then you pay your home rate for the time you spend on the call. You can even use your inclusive minutes if you pay monthly – and your Freedom Pack minutes if you’re on pay as you go.
When you receive a call, you pay the 75p connection charge – and then you can talk for up to 60 minutes free of charge. After that you pay 20p a minute.
You won’t be able to use your inclusive texts abroad – but sending a text to the UK costs just