Lycamobile is a Mobile virtual network operator (MVNO) that operates in Australia, Austria, Belgium, Denmark, France, Germany, Ireland, Italy, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Hong Kong, the United States, Tunisia and the United Kingdom, where it is based. 

Lycamobile sells international pay-as-you-go SIM cards to consumers wanting to make international telephone calls. An MVNO leases radio frequency from mobile phone network operators and it forms partnerships with the operators in each country it serves.