Hello, I've recently bought a secondhand Samsung Galaxy Note 20 Ultra 5G on eBay. Unfortunatelly, the phone is locked to AT&T network. I contacted AT&T and I was told the NCK (Network Unlock Code) which is a 16digit number. Well, because I am a clamsy guy I managed to enter the code several times wrong due to number misclicks and now the phone asks me for MCK (Master Unlock Code) - the code asked when multiple incorrect network unlock codes are entered. Great. I contacted AT&T again and I was told that they do not have MCK code on record and that this code can be obtained only from Samsung. So, I am here.
May I get some advice what are the requirements for obtaining MCK code, which form should I fill in order to request it or who to contact in order to get it? As far as I searched Samsung website and various other resources so far I did not find any suitable information on this matter.
