If you live in Europe, Australia or New Zealand you can bring your own GMS mobile. The Czech Republic uses the GMS 900 system. Now all networks allowing use of 3G phones. It is recommended though that you check with your mobile provider before you leave about using your phone in Prague. If you are planning a longer stay it may be worth buying or renting a phone as calls made via roaming tends to be very expensive (but at least it is much cheaper than it used to be due to the EU regulations). There are three major mobile phone operators: O2 (before Eurotel), T-Mobile and Vodafone (before under name Oskar). Calls made from Czech mobiles to mobiles or landlines cost between 3 CZK to 9 CZK per minute (depending on your tariff). You can buy a prepaid phone from around 1500 CZK (sometimes even cheaper) or you can buy a sim card and use it with your existing mobile phone. Mobiles phones in Prague are very common, and probably more than 85% of the population use theirs every day, and for those text addicts - you can send a free sms message to Eurotel or Oskar users from their www pages.

If you coming to Prague from UK some operators allow use you allowance (your free minutes) even in you are abroad, check it before you fly.