Does RoboKiller work outside of the US? Nate J. June 21, 2018 05:20 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 What carriers are compatible with RoboKiller? Does RoboKiller work on my landline? Why does RoboKiller need my phone number? What code/number do I have to dial to activate RoboKiller on my iPhone? How can I forward calls to Google Voice for voicemail? Comments 0 comments Please sign in to leave a comment.