How do I activate Call Hold Call Wait? Moose Support February 28, 2018 06:22 Updated Follow Please just Contact US to activate this service. Related articles How do I make my phone ring longer before it goes to Voicemail? I requested not to have Voice Mail how do I turn it back on? How do I remove Voicemail and Missed Call Service? What is the Optus Voicemail Number? How do I turn off Call ID (CLI) Comments 0 comments Please sign in to leave a comment.