"I'm fine with this stuff but every month (my sons) are telling me to change to the latest version, and (I say), 'Oh, shut up.' But now it's playing up and I know they've put some gremlin in there, saying: 'Oh, he's had that phone for two years. It's time.' I swear that's what they do." Actor Liam Neeson is convinced his sons have sent a virus to his smart phone to force him to upgrade.