Question Galaxy S8+ Second hands

[mamanduloup]

Hi, I bought a S8+ T Mobile second hands to replace my son's phone, I can use with a SIM from other country (which is my carrier) indeed, I'd like to have it fully unlocked and not see T mobile apps on it.
Does anyone can find or tell me how to find the code to fully unlock it?
Thank you

 

[rgd1101]

contact t mobile to unlock it
read this too https://forums.tomsguide.com/thread...hone-unlocking-phones-recovering-data.201612/