.....As I have already described in my article, 5G works with Sunrise as well as with Swisscom. Very easy to activate via *#*#4636#*#*.... You can find printscreens in my review. It also says how Volte & Wifi Calling can be activated.

I am with Sunrise, currently 5G is not yet running with the OP9Pro.

I can't say because I have to send it back because of a defect.

I don't know because I haven't kept the device.