Hello i bought this modem... This is router with included 3G/LTEmodem. . But i can't change my xbox one strict nat type to open. Nothing because you don't have public IP on the WAN minimum but with...

How often happen it? Do you have ADSL provider?

Does NO-IP support IPv6 protocol?

I'm not sure about your wireless card, I can see two different specifications on this chipset. I saw 150Mb/s and 300Mbps. Maybe you have more concrete info about your wireless card.

Is it possible with 150mbps to achieve 140mpbs, via some setting maybe? Because I reach max 60mbps now, with 150mbps wifi connection. Of course not, real transfer 50-60Mbps

Please set up Channel Width for 40MHz and then see wireless speed.