My face id work somtimes and sometimes not i reset the settings as well

Hi raahim1,

Thanks for reaching out to Apple Support Communities. It sounds like you're having an issue with Face ID on your iPhone. We're happy to help.

We recommend ensuring you've completed the steps in the article you started this post from. Specifically the section to add an alternate appearance. If the issue continues you'll want to complete step 8 as follows:

Reset Face ID

If you still need help, reset Face ID, then set it up again. Go to Settings > Face ID & Passcode and tap Reset Face ID. Then tap Set up Face ID to set it up again.

If you can’t enroll your face, take your device to an Apple Retail Store or Apple Authorized Service Provider or contact Apple Support.

You can also reach out to Apple Support using the contact information for your region found here: Contact Apple for support and service

Cheers!