The success of XDA, which was HTC's first 2.5G mobile phone, had attracted the attention of other network operators like AT&T, Roger, France Telecom and DEUTSCHE Telekom AG. In early 2005, HTC started supplying 3G phones to British Telecom, as a direct result of a joint development project initiated by the parties to bridge the network-handset gaps in technology. This joint project represented a milestone in the second phase of HTC's mobile phone business