Tango is an amazing platform to perform video chatting calls in an easiest way possible. You are just required to register your phone number and an email id.
And now you are all set to call upon and chat. No bugs so far of what I have experienced until now. You can even switch camera’s between front and rear. And even send the messages. Data requirement is also not very high. You can even connect with your friends through mobile number which eventually increase your chances to video chat.