Why does my phone say mobility state unknown every once in awhile

[Android Central Question]

A grey box will pop op on the lower mide part of my screen quite frequently..it says mobility state unknown.it just started about 3 days ago.what does this mean?

 

[B. Diddy]

Welcome to Android Central! Lots of questions about this. See this thread: https://forums.androidcentral.com/a...es-keep-appearing-my-phone-4.html#post6515284. Thread closed to prevent parallel discussions.