Hi, bought a mavic Pro yesterday and on my second flight, after approx a minute or even less I started losing image transmission. I bought it back home, unplugged my phone and re plugged it back in, all fine, so off I went again and then lost image transmission.
Any thoughts please?

Try another cable and use bottom usb port (unplugged the side usb port)
Turn on the airplane mode
Format the micro SD card in the Mavic

Did you receive any error from the app???

If not, try another cable.

Also what type of phone are you using?

Please try with hungdang's advice and test again.

What firmware are you running. For whatever reason my signal quality is terrible on .500 update; really choppy and starts to get weak around 1000' but its excellent on .400 downgrade which is what I am currently running