Holding your phone to the heart.

On an iPhone

Unlock the phone. Hold the very top edge of it flat against the heart, over the small stitched heart on the front. A notice slides down from the top. Tap it.

iPhone XS and newer do this on their own. On an iPhone 7 through X, add NFC Tag Reader to Control Center first, then start it and hold the phone to the heart.

On an Android phone

Unlock the phone. Hold the middle of the back against the heart. If nothing happens, open Settings and search for NFC, then turn it on.

If it will not read

• A thick case, a popsocket or a card holder can block it. Take the case off and try again.
• Keys lying flat across the heart can block it. Let the heart hang free.
• The phone must be unlocked. A locked phone will not read anything.

Typing the number on your card always works, whatever the phone:

Recording a voice

Whoever keeps the heart can send you a link. Open it, tap Record, and speak the way you would in person. You can listen back before you send, and you can send a recording you already have instead, which is what most people do when the voice belongs to someone they have lost.

Making a heart yours

Tap it, choose Make it yours, and type the code printed inside your box. That code is what stops anyone else claiming your heart. Then we email you a six-digit code to sign in, and that phone is remembered.