I have an unlocked Samsung Galaxy S9, and I've heard from multiple sources today that Android 9.0 was finally released to unlocked S9 phones. However, when I check for updates, it shows the error in the image I attached. Additionally, says that it last checked for updates around the same date that I bought my phone. Why is this happening?
This pops up after a few seconds of checking for updates:
EDIT: My phone appears to be attempting to update. I saw a notification that said that it was looking for updates. Immediately after that, I got a message from my carrier saying that my phone requires a software update. As some clarification, my carrier doesn't know that I'm using an S9 since I just swapped my old phone's SIM card in. I'm now thinking that this is a bug.