I purchased a pre-owned Galaxy S10+ from Best Buy. It has One UI 3.1 with the September 1st, 2021 security patch on it. I can't get it to update to One UI 4. Every time I check for updates on the phone it says the software is up to date when it isn't. Is this normal? Will I get the One UI 4.0 update eventually? I am on Google Fi if it matters. The phone appears to have previously been on Sprint.
The device is a Sprint branded, so this is an issue. You will need to flash the firmware to XAA (an unlocked model). Go to XDA developers website and look at the section for your device. Make a post there and users will help you.
