I will need a prepaid SIM card for 2 weeks, to make a small number of phone calls and for some data roaming (maybe about 20MB) to check timetables etc. when we are on the move. We will be traveling from UK with Eurostar via Brussels. Will need phone on arrival in Amsterdam to coordinate accommodation. Can I buy a reasonably priced package before leaving UK, or at railway station in Brussels? Most of the local (Dutch) websites that I have checked will only mail to a Dutch address, so what options to I have?