I signed up with Talkatone and got a US number. Costs me £3.49/mo which is very similar to what I am paying for Skype. The process involved signing up, getting a free number for 30 days and then after I had tested that it works okay subscribed through ApplePay to make the number permanent.
Now I have to find out where I have my Skype number registered and change it. Recently we logged onto my wife’s SS online account to check her WEP status and it insisted on her creating a Login.gov account which involved a validation code sent through our US Skype number. I hadn’t even remembered or known that SSA had that number.