Also, I've been a software developer for over 25 years. I would never push buggy stuff like this. If I did I'd get in trouble because I work with HIPAA data. (genetics software; healthcare; hardware: dna sequencers/pcr machines; cloud dev algorithms) I know it's possible NOT to mess up this much. Yet they do.
After speaking with Samsung support I was advised to take the phone to the local uBreakiFix and they will reflash the OS. They did reflash and the same error came back after a reboot, the great tech Dennis did not give up, he went into the OS and froze the ODADM Sprint app which is causing this issue. Now the phone works fine and I have rebooted over a 12 times and no error messages. I was told as long as I do not do a hard reset this will hold till Samsung addresses this on future updates. Thanks to the local uBreakiFix Tech Dennis. If you got one in your area, check with them. Good luck.
Here what I tried. I took the T-Mobile sim when the power is on. Then put a Freedompop Sim in it. It ask me to restart. It restarted and fully booted up. Then I took the Freedompop Sim and put T-Mobile sim back and restarted. It doesn't give me the annoying message for 2 days now. So I guess you can put any another company Sim to try.
Go to 'Settings' > 'Software update' and hit 'UICC Unlock'