Question will putting a tmobile mvno sim actually get me a chance to unlock it

[devtinagub1]

just bought a tmobile phone and it works fine with my TM mvno sim but tried the unlock app and no go. i reddit awhile back that if you put an active tmobile mvno sim into a tmobile phone for 40 days will allow it a chance to unlock it via the unlock app on the phone if it is not blacklisted. also read the requirements and the one that does concern me is the following
- The account associated currently using the device must be in good standing
im not nor ever have been a tmobile customer. im using a red pocket tmobile sim in my 1+6 (oneplus6). want it unlocked as it increases the value. thanks in advance anyone who knows the details on tmobile unlock app success.
PS ive had many metropcs phones unlock fine via unlock app but tmobile maybe once in the past. whats up with that?

 

[hang-the-9]

Only way to reliably unlock a phone is to contact the carrier and have them unlock it. If you got the phone from someone else, that person that used to own it should contact the carrier to unlock it.