How do you change the access number in case of an issue? TEL3 Support Team Updated June 20, 2021 16:30 Follow Open the TEL3Dialer app and go to the settings page Touch the "Type" option Select "Primary" or "Backup Access numbers" Related articles How much does it cost to make international calls? What is TEL3Dialer for iPhone? How can I register my iPhone’s number? Comments 0 comments Article is closed for comments.