https://www.theguardian.com/money/2025/jan/06/o2-was-tricked-into-transferring-my-number-to-fraudsters-could-i-have-it-back

‘Sim-swap’ fraud has affected three readers – and dealing with their mobile phone company hasn’t been easy

What some O2 customers may have wanted for Christmas was a phone number, since long-cherished ones have had a habit of going astray. Whether they got lucky is another matter, as O2’s customer services can be as hard to pin down as Lord Lucan.