The international country dialing code for Switzerland is +41. The outgoing code is 00, followed by the relevant country code (e.g. 0044 for the United Kingdom). Switzerland also has area codes which must be dialled, even when calling from within the same area. Mobile phone GSM 1800 and 900 networks operate throughout the country. Visitors who wish to use a prepaid sim card from Swisscom Mobile (NATEL easy) will be required to register with the service provider and produce identification. Internet cafes are available in the main towns and resorts; some public phone booths also have internet and email access.