Image Transmission Settings > Channel Mode > Custom is grayed out if the phone or tablet is set to some regions.

In my old tablet the Auto setting's fixed Transmission Quality 10Mbps(0.7km) doesn't update the tablet's screen properly -- only about 30% of the screen is updated every now and then...

But the screen update is good after I changed the location setting to U.S. so I could set Transmission Quality to 4Mbps(3km).

I understand that some regions might have regulations about permitted channels but why is also the Transmission Quality behind the region setup??

If I set my correct region, the DJI APP defaults back to 10Mbps with poor screen update.

I have the same question. Why wont DJI give a proper answer to this?