I bought a Series X and tried remote play on my S10 cell phone. The XBox is connected via LAN, the cell phone via 5GHz WLAN with around 300Mbit according to the router. Nevertheless, the game stalls more often, especially with graphically complex titles. Do you have the same problem with remote play, or are you all running smoothly? Please report it.
I only have mobile internet, my SIM card router is set to 5Ghz and my internet is fast enough to stream the games from the console to my mobile phone.
However, I only have strict Nat type, which is why I have to connect my console and my mobile phone in the same Wi-Fi network. Since the router is technically garbage, there are occasional connection problems.
I use the mobile operator Freenet Funk as the "Internet line".
Cable or DSL internet is not possible with me for several reasons.
