The international access code for the Czech Republic is +420. The outgoing code is 00 followed by the relevant country code (e.g. 0044 for the United Kingdom). There are high surcharges on international calls from hotels; it is cheaper to use the public telephone boxes - phone cards can be bought from newsagents. The local mobile phone operators use GSM networks and have roaming agreements with all major international operators. Internet cafes are available in the main towns.