telecom - the WiFi on a practical level

I have been praising all these diligent engineers of China Telecom who every morning in the weekend at eight o'clock wake me up to tell me they are coming to install my wireless internet connections. They do come, and leave friendly making apologies for the fact the bloody thing does not work.
They point at the device, a locally made router, as the culprit, that does not comply with my wireless card. It must be their problem, since in many places where I switch on my computer, wireless access seems to be possible, although for the China Telecom services I first have to sign up. Nuisances.