I have download software UAV.Basics and install it. The signal for telem port and video stream is OK. But when i move outside, for example. The Raspberry pi side is use USB modem stick (E3372), The Ground side computer used in my mobile phone hot spot. But as i change to such configuration. The video stream and signal disapear. Could anyone to help to answer how should i do when i take my laytop outside from home?