I have no inclination to run to the phone, and I always have to do 1471 and call them back.
My MIL is the worst culprit, and the worst bit is she'll hang up then call again, so I 1471 her and get an engaged tone, and she gets an engaged tone from me and so it goes on for bloody ages, until we eventually connect and he asks why I'm ignoring her calls.
Argh.