You can block international and up to 1,000 numbers. The BT Premium will also allow you to sync up to 2 smartphones so you can sync between the 2.
BT Premium Single Dect Call Blocker Telephone with Answer Machine One Handset
BT Premium Single Hand Set Cordless Phone hardly used Nuisance Call Block BT8500
BT Premium Single Cordless Answer Phone with 100% Nuisance Call Blocking
BT Premium Single Phone Digital Cordless Nuisance Call Blocking 1 Year Warranty
BT Premium DECT Phones with Call Blocking and Answer Machine, Trio Handsets - BT
