New regulations from the EU to prevent so-called bill shock when using mobile phones in Europe have come into force.
Data will now be capped so people can't be charged hundreds of pounds for using their mobile phones when on holiday abroad.
It will not cost consumers any more than 70 cents (56p) per megabyte of data which is far less than rates had previously been.
Phone calls will now be capped at 29c (23p) a minute plus VAT under the new regulations.
The EU said these rules are being aimed at stopping people building up huge bills when using apps such as Google Maps while away on holiday.
However, price comparison website uSwitch.com has warned that no caps will exist for consumers that are travelling outside of Europe.
From 2014, people will also be able to choose a different operator abroad in the EU from the one they use while at home.
Posted by Simon Thomas