Like most Apple products, AirTags are able to be updated with new software over the air, with Apple able to push new firmware when required.
Apple in June 2021 released the first AirTags firmware update with anti-stalking security enhancements that decreased the intervals in which an AirTag separated from its owner will play a sound. Additional firmware updates have been released since that time.
Here's how to check your firmware version:
- Open up the Find My App.
- Tap on the "Items" tab.
- Tap on the AirTag that you want to check in the list.
- In this view, tap on the name of the AirTag to see the current firmware version.
The AirTags launched with firmware version 1.0.225, and Apple has rolled out updated firmware versions every few months since, usually on a staggered basis.
There is no way to force an AirTag update, as it's something that's done over the air through your iPhone. To ensure the update happens, you can make sure that the AirTag is in range of your iPhone, but you have to wait for the firmware to roll out to your device.