Can I sync viber messages and contacts from old iPhone to a new one?

I got a new iPhone and want to use viber on new one but I don't want to lose my messages on old one, is there any way to sync or transfer my contacts and messages to the new one?!

This option is not available, you can only export messages as a text file at this point.

1. Open Viber
2. Select More options
3. Select Settings
4. Select Email message history
5. Once the backup file is created, select the application through which you would like to email it and send it to yourself or any other email