RoboKiller for Android requires that your carrier supports a feature called Conditional Call Forwarding. Currently, we can't offer RoboKiller for carriers that do not support this feature, but we are actively working to try and get other carriers to add Conditional Call Forwarding.
Still have questions? Chat with us!
Support is available through the app or on our website at www.robokiller.com/support. We'd be glad to help!