Using Viber after migrating with old sim

[Windows Central Question]

I got my SIM in another country and signed up for viber.

I have now relocated to another country and purchased a new phone.

Am I unable to transfer my old viber contacts / chats to this new phone.

When I try to sign in, I enter my old number and notifies me that a code has been sent to my old phone (which is no longer in use)

Is this just a limitation of viber? Say throughout my 50 years mobile use, if I want to retain my viber details (like facebook / emails / whatsapp) I am required to always have my old sim?

Thanks, Norman