Just bought a Samsung Galaxy Z fold6. I set a 4 digit pin to open the phone and after using this pin several time with no problems, I could no longer access the phone. Working with their online tech, I was told that I needed to go to an authorized Samsung repair shop. I now learned that this is a common problem with their phones and the only solution is to reset to factory settings. If you have not already backed up your data, everything will be lost. What a rip off, pay $1800 for a phone with software p-roblems and the pay $100 to get it reset as the process from Samsung didn't work.