So I bought a used Samsung Galaxy S9+ (Model: SM-G965U) that was factory unlocked for both GSM and CDMA use. It came with Android 8. I wanted to try out Tracfone as the carrier, so I got a SIM card from Tracfone that used Verizon's CDMA network. After configuring the SIM card and rebooting my phone, the phone started installing Verizon software, and apps, and now behaves like a Verizon phone. I now switched over to Mint Mobile, which I believe uses the T-Mobile network, but it still shows Verizon when the phone boots, and I can't get rid of that or the Verizon apps. The "Service provider SW ver." also still shows "VZW/XAA/SPR", so I'm wondering how to get rid of the "Verizonness" of the phone and get it back to normal. What I really want to do is allow the phone to be updated to Android 9.0. Is there any way to do this?