Mobile phone users will be able to maintain their number regardless the mobile operator they choose. The possibility will appear around October 21, when the technical infrastructure is installed. Customers will only have to make a ten-day notice towards their current operator. The costs for transferring a number from a network to another will be supported by the new hosting network. Still, costs may be partially recovered from the user, the only condition imposed by authorities being an affordable fee. Wired telephones do not qualify for the new option.