Both are unlocked.
The T-Mobile version is the exact same iPhone with the exact same unlock status as the SIM free version. The only difference is it ships with a T-Mobile SIM card inside.
Why would you return it for the exact same phone and waste your time?
They both are the same.
THIS. Oh my god I'm so sick of these annoying threads with the same question over and over.
TC Why are you stressing about returning a phone only to exchange it for the EXACT SAME PHONE? Just toss the Tmobile sim card.