I have my F3 to compare with the new 5x. I can get a lot farther from my phone with the F3 than I can with the 5x. I can roam the whole house with the F3, but more than 1 room away the 5x loses connection.
Also, if I get near where my kids are playing the Nintendo Switch, with bluetooth controllers, the 5x loses connection repeatedly. The F3 has no problem.
Anyone else finding worse Bluetooth performance on the 5x?