Does RoboKiller work outside of the US? Nate J. November 09, 2017 05:46 Updated Follow Sorry, but RoboKiller is only for iPhones on Verizon, AT&T, Sprint, and T-Mobile users in the US and Puerto Rico. Related articles Does RoboKiller work on my landline? What carriers are compatible with RoboKiller? Why does RoboKiller need my phone number? What's going on with my Verizon voicemail? How can I disable RoboKiller on my phone? Comments 0 comments Please sign in to leave a comment.