Disable modem's wifi

Hello,


I have a broadband modem (supplied by the ISP) with wifi to connect to the internet. I connect to the internet through the modem's wifi from my laptop.

Since browsing was terribly slow, I connected a Netgear wireless router to the modem - so that I could connect to the Netgear router's wireless connection - instead of the modem's wireless.

I have no issues in connecting to the Netgear's wireless connection.

Now the problem is that the modem's wireless is also active (in addition to the Netgear router's).

My question is How do I disable the MODEM's wireless?

Thanks for ur help!