How do I fix my iPhone Lock Screen?

Follow the instructions in this support article: If you forgot your iPhone passcode or your iPhone is disabled - Apple Support

Could you please explain your question in more detail so we may try to help?

• Are you asking about your iPhone 8?
• Is this a new problem? Were you able to unlock it previously?
• Or did you recently buy this but cannot get past the activation screen?
• Is there an error message when you try to unlock the screen? If yes, what does it say?

If English is not your first language, then one of these International forums or Apple Support pages may be helpful.

Links for Apple International Support - Apple Community

That will depend largely on what's wrong with it...