Issues since switching from Verizon to Xfinity Mobile

I'm re-posting this, in case my original post didn't go through correctly.

Ever since I switched my cell phone carrier from Verizon to Xfinity Mobile, I've had two unsolvable issues arise. They are impactful enough for me that I'm considering moving back to Verizon, even though I save so much with Xfinity Mobile.

First, the moment my service was switched, my cell number was dropped as an option for receiving a security code to access my Wells Fargo Direct Pay for Business account (what I use to pay all my people). I've worked with Wells Fargo on this off and on for 5 months with no solution. Xfinity Mobile insists they don't block anything and yet this issue was clearly created by moving over to them. Doing a factory reset of my phone, Xfinity Mobile's only suggestion, didn't move the needle on this issue one bit.

NOTE: I can receive SMS messages, even from Wells Fargo. Initially, I had the same issue with my credit card company, but it resolved as soon as I re-entered my phone number with them.

Second, ever since I switched, my wife and I are unable to send any pictures, videos or attachments from our phones via email or other phone apps, such as Whatsapp, when we're connected to our home WiFi, without disabling the firewall on our Motorola cable modem first. I can't upload or download files to OneDrive either. This happens on some, but not all, outside WiFi networks too. Since turning our firewall off and on again is a major pain [Edited: "Language"], not to speak of a security issue, we just turn WiFi off on our phones and do things via cellular which creates unnecessary data usage and brings us super close to our limit each month for no good reason.

NOTE: I understand that this is seen as a 3rd party issue to be resolved with Motorola. Still, the fact is that this issue didn't exist when Verizon was my carrier. Motorola has been unable to provide a fix and I can't troubleshoot this when I'm connected to public WiFi networks.

I also had some issues accessing the internet on my phone while I was traveling, both with WiFi turned on and off and with a strong enough cell signal to make and receive calls. I had to turn WiFi off in order to access and send/receive certain things while traveling with Verizon too, but it always worked when there was a cell signal. Since I don't travel like I used to before the pandemic, it's difficult for me to determine how much this is or isn't an ongoing issue so I'm just mentioning it as an aside.

If anyone has had the same issues, especially if you've found a fix, I would love to hear from you.

Thanks!

Paul