Just want to chime in saying that all my family have now moved away from 2degrees mobile because of call quality issues. I'm still remaining on them due to data sharing but as soon as this stops I'll also be moving my mobiles away - thanks 2degrees for making this easy by matching your competitors plans...
The fact this is trivial to diagnose (refer back to my comment here: https://www.geekzone.co.nz/forums.asp?forumid=85&topicid=283864&page_no=16#2753592) speaks to me they simply don't care about this issue or there are other problems that have not been communicated to customers such as perhaps old equipment running voice soon to be replaced with Nokia Ericcson equipment as part of their 5G upgrade.
But either way the lack of communication has caused many people I know to move away.