can i change my apple id on my phone

If you want to use a new ID, have you followed the steps in this article? Make sure you turn off Find My Phone before signing out of the old ID. Once signed out and Find My Phone is off, then sign in with the new ID, then turn Find My Phone back on.

What to do after you change your Apple ID or password - Apple Support.  *.  

Yes you can!

Go to appleid.apple.com and sign in. In the Sign-In and Security section, choose Apple ID. Enter the email address that you want to use as your Apple ID. Choose Change Apple ID.