I really have a problem understanding Wi-Fi calling. I have a new Pixel 6a and would like to try this BUT what is the benefit? I am going to be charged anyway for the usage. It makes no cents to me? I use WhatsApp regularly and it works great from anywhere in the world. I know that numbers have to registered for WhatsApp, but some one please explain the benefits of this to me. I am a regular Rogers customer with unlimited calling/texting within Canada and reside for 6 months in the US. If I needed to use my phone regularly, I would just go and get another Sim card down in the US. My Pixel 6a is unlocked. Please explain.