Download Viber 184.108.40.206554 apk
As you can see the methods are very simple. You can use any of them either according to your preference, they all work.
very important : If this tutorial helped you , then Please click on the +1 button
thanks a lot for your help . Oh by the way if you don't know how to install APK file. than you can follow this tutorial : how to install apk files in Android phones.