Programs: AC*SE, Marriott PP, SPG P, Hilton P, National EE, Avis First
the other thing phone booking can do for you is open up many more routing options vis a vis booking you under multiple codeshare agreements on the same ticket. where online you will find AC+1 other. whereby if you look online you may find there are no routing options available for your dates. but when you call in you may be routed from ac to ua to co, for example.