A global effort under the auspices of the ITU to encourage governments and regulators to allocate RF spectrum consistently across borders, thereby enabling global roaming, interoperability and global markets for telecom equipment. Every four years, the ITU holds the World Radiocommunication Conference, where global/regional spectrum assignments are negotiated and agreed. A recent example is the 1.9GHz to 2.1GHz band, which has been allocated to UMTS in almost every geography. The WiMAX Forum is undertaking similar efforts to support global allocation of 2.5GHz and 3.5GHz for wireless broadband.