Edit:. It doesn't work. See later comment. I took matters into my own hands and solved this problem. If you do this, you could destroy your device if you are not careful. You have been warned. This is not an appropriate solution for everyone...but it was perfect for me. I was able to use Odin to flash the unlocked firmware to my Galaxy S10+. Flashing the unlocked firmware exposed the settings in WiFi > Advanced and allowed me to turn off this horrible "feature". Now I can connect when *I* choose to. Here are the quick steps. Obviously I can not explain full details so you need to be quite tech savvy OR have good Google skills. Otherwise do not attempt it. 1. Back up your phone to your windows PC using smart switch windows application. 2. Factory reset your phone. Leave the Sim in. When it boots back up to the "pick your language" screen or whatever, power it off. 3. Find the appropriate firmware for your exact model device. I used the unlocked firmware that was the same version as the carrier firmware that was already on the device. This is where your Google skills come in. Be very careful - the wrong firmware could brick your phone. It may be difficult to find and / or require registering on some website, and / or take a very long time to download. Recommend verifying the checksum of the file for safety. 3. Find the appropriate version of ODIN, put your device in download mode, and flash the firmware you found. Make sure you use instructions or watch a YouTube video from a reputable source. 4. When the phone boots back up, it will be on unlocked firmware. You will no longer have the Xfinity mobile logo when booting up - it will be the Samsung logo instead. All xfinity apps will be gone. You'll need to download the voicemail and any other Xfinity apps you need from the play store. After you get to the home screen, you can use windows Samsung smart switch to restore all of your content. 5. Now promptly proceed to WiFi > advanced > hotspot 2.0. First, go into Xfinity and turn off auto reconnect. This is probably all that's necessary. I also went ahead and turned off hotspot 2.0 entirely. Now my phone no longer connects!!! I can drive through town without my phone trying to connect to every Xfinity hotspot I pass anymore. It's wonderful!!! Attempt at your own risk, not for the faint of heart. This was performed on a Galaxy S10+ carrier version. Now my device has the unlocked firmware and no carrier bloatware. Keep in mind that if you are not already sim-unlocked, this will NOT sim-unlock your device. That is a totally different thing... These steps should be similar for Note devices and other Galaxy devices that are affected as well. Anyways, hope this helps someone. And shame on Xfinity for not exposing these settings in their own carrier rom. It is unacceptable to force this upon us with no choice.
... View more