I had US Mobile T-Mobile on my rooted Qin and RCS worked flawlessly.
Due to bad coverage in lakewood I changed to US Mobile Verizon and RCS gets stuck in setting up. I emailed them and got them to turn on CDMA less mode.
I came accross this:
The thing is all the options that guide says to do is already done on my phone so that can’t be the issue.
Blaming it just on root can’t be because it worked with T-Mobile.