How do you change the access number in case of an issue? TEL3 Support Team Updated November 15, 2016 23:14 Follow Open the TEL3Dialer app and go to the settings page Touch the "Type" option Select "Primary" or "Backup Access numbers" Related articles How do I place a call with TEL3? What are the "Instant Access" numbers? What if I place a regular domestic call with the TEL3Dialer app, will I be charged by TEL3? Comments 0 comments Article is closed for comments.