Verification not worked after switching phones – Ringo: Low cost calls Review

I don’t understand before switching phones it was working fine as soon as I switched my phones it started to ask me verification and verification SMS never received. Is this some kind of scam please don’t use this APP. This is not at all good I ended up using google voice which is cheap too. Total waste of 20USD. This app is not good at all.
Review by Balineni on Ringo: Low cost calls.