I have a Samsung Note 8 with Tmobile and put in the phone pin after startup (not sim pin) wrongly 3 times. I got a message saying - "pin blocked. Your pin has been blocked. To unlock your device, contact your service provider".
I had no access to any phone functions except 911 and SOS calls, so I reluctantly did a factory reset which seemed successful (i can hear Samsung voice prompts to set up phone), but i am still getting the screen with the message above and no access to the phone itself.
I have no idea what Android version i'm on but it cannot be older than Pie.