Any iPhone??
I am having issues on iPhone X with software 11.3.1 and 11.4 and my AVST UM Mobile software. Older iPhones and iPhone X that have software less than 11.3 seem to work just fine, but on the X with the latest software you can see the phone connecting to the profile on the system but it will not allow the user to login. I have a theory that they rolled out some new functions on the iPhone X that didn't go live until the last couple of software releases, but I don't use that Apple crap so I have no way to test it myself. AVST has admitted there is a problem, but it is a very small subset of devices and they don't know if it is phone/software related or a problem with their app. In this case, same story, Android is working just fine.
Don Bruechert, Voice Comm Analyst II
CareTech Solutions @ Holy Family Memorial
Manitowoc, WI, USA