Viber Activation Failed (even trying with different phone numbers)

Hi,

I just moved my Viber to my iPhone 12 Pro. However, Viber first said the number (US) is blocked (after I needed to install and remove a few times). I contacted Viber for help (many times) as I do not want to lose this number of lots of messages and photos but no response!

I gave up on reviving this number but then tried to activate Viber with a new number. However, I keep receiving "Activation Failed". I then tried on different phone numbers but got the same problem. Something must be wrong with either Viber or iOS. I am using iOS 16.2.

Any help would be highly appreciated.

David