Sorry, your info is not correct.
You need to have a sim card in the dongle AND internet connection to the RC. The internet for the RC can come via router wifi, mobile/phone hotspot or you can have a second dongle in the RC, with a second sim card.
Yes. Note that this is a two way data communication, one side has to receive the data, where the other part is sending. Do not think as a phone call where the caller pays the cost. No.
The dongle 2 needs a 4G enabled Ism that has data to connect to the Dji Servers. The RC needs a data connection either via wifi or mobile hotspot to your phone to be able to communicate with the dongle 2 in the drone. If the RC has no Data...
So you mean, it is not necessary. I trust that, OK. So, shall we assume that the triangulization we get will not be very different as per the real values.
But, note that the flight height of a satellite is so big that, the difference in the...
Further to the discussions above, I think I could not explain the core point. Thanks for the valuable feedback above, but I am afraid the real point is missed.
Please do not stick to the figures 20mt-40mt etc given above, these are for examples...