I have been trying to unlock my Fold Z3 purchased for cash from Samsung 3 months ago but tmobile is keeping it locked. I have spent hours chatting with tmobile over the last 4 days and keep being told wait "24 hours" to unlock and now am being told wait another 72 hours... I spoke to Samsung on the first day of this problem and they messaged tmobile while I was on the phone with them to tell them to unlock it. I was also told by the Samsung rep that tmobile is the only carrier they have this issue with... I was initially trying to unlock so I could use an AT&T sim to install the Android 12/UI 4.0 update that tmobile is now weeks behind issuing but now I'm thinking Verizon is sounding good...