While it is possible to obtain used handsets for the Thuraya, Iridium, and Globalstar networks for approximately , the newest handsets are quite expensive. The Iridium 9505A, released in 2001, sold in March 2010 for over US$1,000. Satellite phones are purpose-built for one particular network and cannot be switched to other networks. The price of handsets varies with network performance. If a satellite phone provider encounters trouble with its network, handset prices will fall, then increase once new satellites are launched. Similarly, handset prices will increase when calling rates are reduced.