How exactly does wireless internet work?

I have a Dell Inspiron laptop and I am getting to the point where I'm needing to fly with and go to places with my laptop. I have ATT DSL at home. They just sent me a modem (I have one already) and two wireless cards, but they look like paper cards. I don't really know how exactly wireless internet works. Do I need another equipment? Please help!How exactly does wireless internet work?
First of all, place your SIM card (wireless card, the chip) onto the modem. Then you plug in the modem onto the USB slot available on your laptop. Once it is plugged in, on the screen of your laptop, it will usually prompt a browsing menu. This shows on the screen if the modem has a pre-installed software for browsing. Otherwise, an installation disk should be available in the modem package of yours.



Follow the instruction upon installing the software (either via the pre-installed or the disk). Once it is installed, your SIM card should also be able to get the signal. Press connect / dial and when you are on, use your internet explorer or browser application on your Dell to start browsing.



Just make sure that if your SIM card were a prepaid, the balance is sufficient.



Take care and dont forget to.. ENJOY!How exactly does wireless internet work?
In simple terms, you have two hardware devices that make up wireless connections. First, you have a Wireless Access Point or AP or WAP. A wireless access point is simply a wireless hub. An AP has antennas for sending and receiving the wireless signal to other wireless devices and it also has a cat 5 connection for connecting to the network.



The other device is a Wireless NIC. Wireless NIC's are manufactured for both desktop and laptop applications, however, the laptop NIC's are more popular. The wireless NIC's have a built-in antenna and it is also sends and receives signals. 802.11b/g devices send and receive at 2.4GHz.
Well, Wireless internet works this way; Your Wireless card sends our packages, it tries to find a wireless router. Most planes/airports/restaurants have Wi-fi, which is wireless internet, free. Your Wireless card will see that the airport has Wi-fi and will connect to it. Once your wireless card connects to the airport internet, it will start receiving internet, and then BAM, your good to go.
Your laptop should have a built in receiver if you cant connect check you computer for spyware : Pando, Gamevance, etc and uninstall it. In other words you need a wireless router in your home butnyou lap top should be able to pick it up freely
you will also have to buy a wireless router for your laptop to connect to the internet. In public places you can usually get free internet if your laptop detects the signals coming from wireless routers.