BT Premium Phone with 100% Nuisance Call Blocking, Mobile Sync and Answering Machine. Say goodbye to unwelcome calls with the latest landline cordless phone from BT featuring award-winning call blocking technology capable of blocking 100% of nuisance calls. The BT Premium Phone is a sleek and sophisticated home cordless phone with excellent sound quality, reliable range and can even let you make and receive mobile calls on your landline.. Nuisance Call Blocking. With the BT Premium Phone you can block 100% of Nuisance Calls and only talk to the people you want to. The advanced call blocking technology allows you to block incoming calls from common types of nuisance callers - e.g. international, withheld, unknown or payphone numbers. And when you dont want any calls at all to your landline simply switch on the Do Not Disturb mode and enjoy peace and quiet (and peace of mind!).. Answer mobile calls on your landline. Synchronise your mobile to the BT Premium Phone to copy phonebook conta