My phone was stolen — what do I do first? One word, from any phone that can text my number: lockdown. What can a thief with my phone actually do? Less than you'd fear, and less every release. Add a passkey Open your signed trust centre and follow Add a passkey. I lost my Saint device Tell me and I put it in lost mode. Someone ported or swapped my number This is the attack we take most seriously, because your number routes the conversation.