dronebandit, could you please post link for other forums and threads that mention the newer 300B?
This is the first mention I have found about this. My controller happens to be of that flavor.
I received my new Phantom 3 Professional yesterday and after easily updating firmware on Drone to 1.26 and figured after as smoothly as that went, the RC would be a breeze, however not the case. I tried multiple USB drives, Mini SD cards, SD readers and trying to update from having RC attached to Gimbal with no luck. RC will not update and I am super bummed.
Trying to figure out as much info as possible while toying with the idea of just returning the phantom. I was so excited to get this, have not even gotten to fly it once and I have an RC that refuses to update.
These updates could stand to be streamlined a bit for sure.