Billing related information reporting

An apparatus comprising:

• a communication interface for communicating with a radio communication unit that is configured to perform radio communications with a base station capable of forming a cell for relaying mobile data between the apparatus and a mobile telecommunication network;
• a radio-physical detector for obtaining billing related information from the radio communication unit;
• and
• a trusted platform module including a trusted execution environment configured to attest the billing related information by encrypting the billing information to be sent to the mobile telecommunication network, the trusted platform configured to:
• obtain a challenge known by the mobile telecommunication network;
• receive billing related information from the radio-physical detector;
• attest the billing related information by encrypting the billing information, in response to the challenge;
• and
• cause the apparatus to send the attested billing related information to the mobile telecommunication network;
• the apparatus further comprising a mobile communication device configured to communicate through the base station with the mobile telecommunication network,
• wherein the radio-physical detector is configured to produce an indication of operation of the base station from which the mobile communication device receives radio signals and the billing related information comprises the indication of the operation of the base station.