We've been trying this IP 900 mobile app in our office with mixed results. Has anyone else used it, and what problems have you experienced, if any?

What version of software are you running on the 900? I have used it a little in our office local but have not had luck getting it to work off site.

9818 shows 25.1.4.5.

When I first set it up, it worked fine everywhere. The there's a glitch where it loses registration when switching from 4G to wifi. I can only assume that's normal. Now registration is hit or miss remotely. App will register locally, but no audio in either direction to other remote app users or to remote IP phones. If the app is connected locally, it works fine when calling a digital station. Our IT is supposed to look at it at some point, but our own company issues are always on the back burner....

This sounds like about the same with our system.