Unlock iPhone from ATT to T-Mobile?

[JDMricist]

Hey everyone! I searched but only found info on unlocking the other way around but I have an iPhone 12 Pro locked on AT&T that I am trying to use with T-Mobile. I’ll PayPal/Venmo/cash app whoever can help me out $20 after it works.
Thanks!

 

[Lifeisabeach]

If you have paid it off, then just fill out a form.

Unlock a Phone or Device - AT&T Device Unlock Portal

www.att.com