I purchased a U.S. unlocked sprint version note 10 plus and ive had it for a week. It is running UI 2.0 with the January 2020 security patch. When i try to check for updates it always says its up to date. I called samsung and they said they cant do anything and really didnt give me any direction whatsoever as to how to even attempt to fix my issue. My IMEI is not black listed. I took it to a samsung recommended repair shop and asked if they could flash it and they said they didnt want to because they didnt know any thing about my current carrier which is H2O Wireless. They told me to call my carrier so i did, twice, because they reset something on their end and both times claimed it would now update and it didnt work. Any suggestions?