How to pair again my AirTag with my iPhone?

Hi Amgasit,

Thanks for reaching out and asking this question. I see your problem. Please make sure your phone is updated to the latest software. You can do this by opening the settings app and going into General>Software Update, and then selecting the most recent software update. Once you have verified that your phone is up to date, please open the Find My app. Under the items section at the bottom, please click add item. From there, you will be toured on how to add an airtag to your device.

Thanks,

RR