I FORGOT MY IPHONE PASSCODE

You will have to erase your iPhone and set it up again after that.

If you don't have access to a computer, follow the steps in this article:

How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support

To erase it using a computer, follow this one:

If you forgot your iPhone passcode - Apple Support

You should reset your phone with your laptopor pc, after that you can enter with your Apple ID on your iPhone