I'm currently on my 3rd Samsung phone (2 Note 9's, and my current S10+). I've tried for over two years to get updates resolved. AT&T says they will push them, sent me to local store, Best Buy, Samsung, etc. No updates will happen on my number. I've reset the phone and tried to use the Samsung software connected to my PC. I've had this S10+ for over a year and it is still running Android 9, with a security update from March 2019. Checking for updates says there are no updates. Since this has occurred on 3 different devices it seems to me this issue is related to the number/account at AT&T. I've tried their support, but it is horrible. I keep getting transferred, and the last wait time was 60 minutes, but then it times out due to inactivity. I'm honestly done with AT&T, but wanted to try this route to see if anyone else has experienced this.