How to forbid my location only for Viber on my Android phone? I want to know how can I switch off the location service ONLY for Viber on my Android phone. I know there is an option to do that on iOS, but is there any way to do it on Android phone?
Unfortunately, when you get an android phone out of the box, no, there is no way to do that. 

However, if you're willing to root your phone, then you can use apps like "Apps Ops Starter" which essentially launch the hidden settings for you to use which would allow you to find Viber (or any other app) and see its permissions and deny them one by one.