Best U.S. Number via VoLTE or VoIP for Client Communication (One User)?

I’m looking to set up a U.S. phone number for direct client communication. I’m considering using a service that offers VoLTE or VoIP, and I want to keep it simple for just one user. I’m curious about which service provides the best reliability, call quality, and the best value for money.

Has anyone here used these services for business purposes? I’d love to hear your experiences and recommendations.