phone.com is the good services for virtual phone numbers as they are having lot of real look like numbers from around the world. But they are not accepting bitcoin payments as per I have checked with them.
Thanks.I'll check them out.
They are not charging per call nor per sms. We can change numbers as per our wish so that we can have more numbers. But familiar services like gmail verification might get failed as some numbers had already been used by other users.
That's the problem,most of the free numbers have already been used for a similar service.Anyway,I found TextMeNow they provided me with a free number.Working fine for now.