What I did to avoid any non-compatiblity issues with the Eonon USB port was to fit a USB wifi modem in the vehicle, essentially creating a hotspot. I fitted a twin USB socket where some have the torch socket, next to the glove compartment. The Eonon works over wifi to the modem, as can any other phones, tablets being used. The modem I use has external antenna ports, which I used to run coax up to the windscreen trim where I fitted mobile frequency range aerial.

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Neil

2016 X5 3.0D
2009 X3 3.0D
2005 X5 3.0 Diesel Sport (sold)
2007 320i (sold)