RM500Q-GL windows 11, cellular network setting doesn't show up

Hello @silvia
I’m running iPerf speed tests with the Quectel RM500Q and a 5G network. Here’s my scenario: PC–(USB3)–Quectel → Amarisoft 5G SA callbox. I’ve noticed that the speed is very low. For example, when I download a file to my PC, the download is slow and the speed is around 15 Mbps.
Do you know how to get a normal speed, please?