The Baby FM thermometer can be paired with only one smartphone at a time.

To switch to a different phone

1. On the original phone, open the Baby FM app and go to Settings > Device > Unpair.
2. On the original phone, also remove Baby FM from your Bluetooth paired devices list.
3. On the new phone, install the Baby FM app and log in to your account.
4. Follow the standard pairing steps (see Pair Your Thermometer with the App).

Note: Your measurement history is tied to your account. Logging in on the new phone will restore your data.