I believe I have the same issue. Installed my newly delivered Dudu7 yesterday and tried to use my Iphone 12 Pro as a hotspot. It keeps attempting to get an IP adress but ends up with an error message that saving the IP failed. It’s a company phone with VPN configured but I can use the same phone with other devices without any problems. Devices such as an (Android) Chromecast, a Samsung smart tv, other Iphones (iphone 11 and 13). Other Iphones (iphone 11 and 13 without VPN) that I tried did connect without issues. Would appreciate if a solution could be provided. Apart from that, very impressed with this unit, wow! Keep up the great work 👍