hi how can I fix my face id

Hello!

My recommendation is to take the device in for inspection at an Apple Store or Apple Authorized Service Provider (AASP):

• Genius Bar Reservations: Genius Bar Reservation and Apple Support Options
• Locate Apple Stores & AASP’s: Find a Reseller 
• iPhone Service & Repair: iPhone Repair & Service - Apple Support

Have a nice day, and good luck!

If the steps in this article don't solve the problem, write back.

If Face ID isn't working on your iPhone or iPad Pro - Apple Support