How do I re-add a forgotten Bluetooth device on my iPhone 15?

Go thru the pairing process with that device again.

JSBoggy Said:

"Unforgeting bluetooth device: On my iPhone 15, I accidentally told bluetooth to forget a device but I need it back. How can I get it back?"

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Getting a Forgotten Bluetooth Device Back:

A. Re-Pair this:

Restart your iPhone and then try adding this device back by pairing it.

or...

B. Restore from a Backup:

Do you have a Time Machine Backup of your iPhone that you created prior to forgetting this device? If so, restore from it. If not, then take this as a learning experience, knowing to always create a Time Machine backup of your iPhone prior to making any major change to it (i.e. iOS upgrade), so that you can have something to restore your Mac from, should any password mishaps happen. NOTE: The backup needs to be of the same iOS version that is currently installed.