I am having trouble pairing air tag with the iPhone. I have up to date software

Hi, Chae5,

The Apple Support article Set up your AirTag using your iPhone, iPad, or iPod touch - Apple Support discusses how to set up an AirTag, and includes the following guidance if you have trouble:

If you can't set up your AirTag

1. Make sure that your device is ready for setup.

2. If the setup animation disappeared, press the side button or Sleep/Wake button on your iPhone to put your device to sleep. Then wake and unlock your iPhone. Wait up to 15 seconds, and the animation should reappear. 

3. If you have multiple AirTags to set up, make sure that only one is near your device at one time.

4. Remove and then replace the battery in your AirTag.* 

5. If your AirTag still won't connect to your device, reset your AirTag. 

Learn what to do if you see a message that says the AirTag is connected to another Apple ID.

* Warning: AirTag, the battery cover, and the battery might present a choking hazard or cause other injury to small children. Keep these items away from small children.

If you've gone through these steps and still cannot set up your AirTag, please get in touch with Apple Support directly. You can do that here: Get Support.

Enjoy your weekend.