how do i update airpods gen 3 as mine is still on version 4b66

Hey there Agaddu089,

Thanks for reaching out to Apple Support Communities. We understand you are wanting to update your AirPods. We're happy to provide some assistance.

Your AirPods will update automatically if you are connected to an iOS device or Mac that is using the latest version. Make sure the device you're connected to has Wi-Fi turned on.

If you are unable to update your AirPods, reset them by following the steps here:

How to reset your AirPods and AirPods Pro

Put your AirPods in their charging case, and close the lid.

Wait 30 seconds.

Open the lid of your charging case.

On your iPhone, iPad, or iPod touch, go to Settings > Bluetooth and tap the More Info button  next to your AirPods. (If you don't see your AirPods in Settings > Bluetooth, just go to the next step.)

Tap Forget This Device, and tap again to confirm.

With the lid open, press and hold the setup button on the back of the case for about 15 seconds, until the status light flashes amber, then white.*

Reconnect your AirPods: With your AirPods in their charging case and the lid open, place your AirPods close to your iPhone, iPad, or iPod touch. Follow the steps on your device's screen.

AirPods can be associated with one Apple ID. If you want to use AirPods (3rd generation) or AirPods Pro that someone else has used, they first need to remove the AirPods from their Apple ID.

Resetting them can potentially resolve unexpected issues.

We hope this helps.

Have a great day!