T-mobile text is it real?

I am having trouble with my phone and my wifes phone. Most incoming calls go right to Voicemail on both phones..

During calls the callers voice will cut out intermittently and sometimes come back and other times I have to call them back.

I was told in a text I received at 6:31 Yesterday that my VoLTE settings were out of adjustment  and to go to t-mo.co/3n4UXjQ which I did on my computer and now I am wondering if it is a scam