A wireless network for operation with a General Packet Radio Service GPRS, Global System for Mobile Communications GSM/Universal Mobile Telecommunications System UMTS mobile station, said wireless network comprising a radio frequency transceiver for communication with said mobile station, said wireless network comprising a controller for sending through said transceiver a MEASUREMENT INFORMATION message, a Broadcast Control Channel (BCCH) containing a SYSTEM INFORMATION Type 2quater (SI2quater) message, both for use in constructing a 3G Neighbor Cell list, said controller further sending a Packet Broadcast Control Channel PBCCH comprising a PACKET SYSTEM INFORMATION Type 3quater message for use in constructing the 3G Neighbor Cell list, the PACKET SYSTEM INFORMATION Type 3quater message comprising a PSI3_CHANGE_MARK information element, said controller being responsive to a receipt from said mobile station of a MEASUREMENT REPORT message or an ENHANCED MEASUREMENT REPORT message for reporting 3G cells when operating in a GSM dedicated mode, said MEASUREMENT REPORT message or ENHANCED MEASUREMENT REPORT message being received from said mobile station prior to said mobile station constructing a complete 3G Neighbor Cell list from received MEASUREMENT INFORMATION, where the value of the LSB of the PSI3_CHANGE_MARK information element is reported back to said controller as a 3G_BA_IND information element.