Inter-carrier scanning is triggered in a mobile device based at least in part on location thereof. Femto access point (AP) that can serve the mobile device can determine location through cell or sector identifier that is extracted via scan(s) of macro wireless environment of the femto AP. Femto AP can rank extracted sector identifier(s) and establish home macro sector (HMS) identifier(s), and also can generate scanning requirements for idle-mode scan(s) by a mobile device that operates in a HMS and is authorized to access wireless coverage through the femto AP. Scanning requirement(s) can force periodic inter-carrier measurements of a HMS wireless environment, and establish HMS-specific radio link quality threshold(s). Wireless network can receive at least one of HMS identifier(s) and scanning requirement(s) and deliver same to mobile device(s) authorized to exploit wireless coverage through femto AP associated with the HMS ID(s) and the scanning requirement(s).