Hello and welcome to justanswer, My name is ***** ***** i will be assisting you today,
I'm sorry about the issue, please follow these steps to fix the issue,
1-first go to this link : https://support.viber.com/customer/portal/emails/new
2-fill out thr form and send them a screen shot of the error message
3-wait an hour ot two, then you will get a message that your number has been unlocked
hope this help
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