Fixed-mobile convergence, that is, using a mobile terminal for both fixed and mobile calls, seems an easy enough concept, but bringing it to reality is proving no easy task. The handset would act as normal when on the move, using cellular radio frequencies and protocols to communicate with the mobile networks' base stations. Indoors, the device becomes a cordless phone, communicating over unlicensed frequencies with an indoor access point connected to the fixed network. This article takes a look at the fading boundaries between fixed and mobile telephony.