Some accuse WiMax of being a media fashion very similar to the one that, in 2000, affected the UMTS, a technology that promised a revolution in mobile phones, despite the fact that the terminals were not ready yet. Right now WiMax is surrounded by a doubt that will only dispel when the certified terminals start working. The company which will validate the hardware, Cetecom, has its head office in Málaga, Spain.This doesn’t mean that the manufacturers are not marketing their equipment yet. Airspan Networks, Aperto Networks, Proxim, Wavesat and Sequans sent their solutions in August, but while they wait for Cetecom’s certificate, the companies are selling their complete hardware (both the transmitter and the receiver), so that they don’t need to interoperate with other firms’ hardware.They work directly with the operators in several trials named ‘Pre-WiMax’, because the equipment used is not approved yet and, therefore, it can’t interoperate with the one from other companies, despite being perfectly functional. Actually, the majority of the firms are part of the WiMax Forum, an international organisation which establishes the certificates’ criteria that Cetecom will then validate.