Not working with IOS 10.2 using T-Mobile – Avaya one-X® Mobile Preferred for IPO Review

This app is no longer working on IOS 10.2 using US T-Mobile Data (Carrier Version 27.1). It does work on wifi but when you use only mobile data it no longer connects to the server. I am having this problem on Iphone 7 plus.
Review by rsakakibara on Avaya one-X® Mobile Preferred for IPO.