What are the requirements? TEL3 Support Team Updated November 15, 2016 23:14 Follow Compatible with iOS 3.2 and higher An active account Your iPhone number registered as an Instant Access Number Related articles Why do I get an invalid number message when I try to place a call? How do I sync my speed dial numbers with the TEL3Dialer app for iPhone? Why can’t I redial a number automatically from the TEL3Dialer app for iPhone? How do you change the access number in case of an issue? Why does the TEL3Dialer app not work properly although I downloaded it from the App Store? Comments 0 comments Article is closed for comments.