If you had to buy a MiFi router, because your Volvo doesn’t come with a SIM modem, or you don’t want to pay for a data plan and your Volvo won’t connect to it saying “No Internet” then trying going into the Router’s admin settings and change the IP address of the router to 192.168.0.1 and the DHCP range to 192.168.0.2 to 192.168.0.254
My Router was set to 1925.168.100.1
When I did this, the car connected to the router immediately.
If 192.168.0.1 and DHCP range 192.168.0.2 to 192.168.0.254 doesn’t work, they try 192.168.10.1 and the DHCP range to 192.168.10.2 to 192.168.10.254.
It seems that there is a bug in the Volvo software which causes the networking not to handle the DHCP handshaking very well.
The Volvo seems to request a static IP in one of the above ranges.
Changing the Router IP ranges was enough luckily as the DNS setting and Netmask settings were locked down.