Interested to know how it works if Google don't have your phone no.? Certainly every time they've nagged me for a phone no. I decline the gracious opportunity to give them another identifier. My gmail account long predates the mandatory phone no. step, and so far I think I've managed to dodge it.

Thinking of ditching the ~tracking device~ phone anyway... what then? Have we sleep-walked into a world where people without a mobile phone are the underclass who barely even exist?