Mobile Wifi How To Connect A Laptop And A Mobile Using Wifi With A Desktop PC To Use Broadband Connection?

How to connect a laptop and a mobile using wifi with a desktop PC to use broadband connection? - mobile wifi

I have an XP desktop computer with broadband cable via an Ethernet card. I have 2 wireless laptops (XP and Vista) and a WiFi phone. I surf the Internet from my laptop and using mobile broadband connections exist. What are the hardware devices need to create a local wireless network for the exchange of files and with the existing broadband connection.

Thanks in advance