why did my phone lagged after updating in ios 16

Hey there geml,

To clarify, is your iPhone unresponsive to touch after updating? If so, try using the guidance below to help get things running smoothly again:

If your screen is too sensitive or responds intermittently to touch

1. Restart your iPhone or iPad.

2. Make sure that your screen is clean and free of any debris or water.

3. Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different outlet, cable or charger.

4. Remove any cases or screen protectors.

If the screen isn't working on your iPhone or iPad - Apple Support

If you need help with something different, feel free to provide more details in a reply.

Take care!