What happens if I lose my phone? If your phone is lost or stolen you should immediately try to lock access to the device (i.e. find my iPhone or find my mobile). To disable your 2FA and help you set up a new device, you'll need to contact us below. Related articles How can I update my personal details? How do I enable/disable Two-Factor Authentication (2FA)? What is 'Managing devices?' What is Two-Factor Authentication (2FA)? What happens after I’ve enabled Two-Factor Authentication (2FA)?