This has been a problem for many developers recently. It seems as if the call me feature calls you from north america. The problem is that line does not have global reach. You can reach a UK or US number.

Try using a phone redirection service such as vonange that allows you to buy a phone number for less than a euro a month.

Recently I have been making more international flights for work. It seems that all airports now have a shopping mall as part of the process.

The process seems to be: pass a gate that requires a boarding pass. Ditch or drink liquids so you can pass the security check (which varies wildly between airports).

There is then some form of passport check – frequently automated.

You are then left with a curving path through a duty free store before you get to the screens announcing the gates.