In 2020, Apple sold an iPhone Leather Wallet that attached via MagSafe and held three credit cards. I bought one and have used it for a year, and I like it! But this year, Apple has revised the wallet to add a new feature: Find My support.

Here’s how Apple describes the feature:

The new wallet features a secure NFC chip which enables support for Find My. It can hold up to three cards, and it’s shielded to keep them safe. To use an NFC-enabled card, such as a hotel key, you need to remove the card from the wallet.

This new wallet works with all iPhones with MagSafe, not just new models. I attached it to my iPhone 12 mini and it walked through the setup procedure. You can choose to have your iPhone notify you if the wallet has detached, and also optionally to have your wallet disclose your phone number if it’s found and attached to a different iPhone.

Best as I can guess, this is what’s happening: the NFC chip in the new wallets has a unique ID number. When you pair it with your iPhone, that ID number is associated with your iCloud account. If you choose to allow someone who finds your wallet to view your phone number, Apple’s essentially allowing their phones to look up the number associated with your iCloud account.…