I want to upgrade my current Blackberry to the 8120, so I can use the WiFi to surf internet without a data plan. When I called AT&T they said a data plan is required on the 8120 to use the WiFi feature. T-Mobile users have said that they dont need a data plan, does the same go with AT&T? It doesnt make sense, and yet the service provider should know what they are talking about..

dataplan is not required to use wifi to connect.

Without a data plan, you can use the Wifi/Hotspot Browser to surf the internet. However, most applications that use an internet connection will not work and email and other BlackBerry functions will NOT work.

I have AT&T. How do I set up my blackberry 8120 to get out to the web using wifi. I can't get it to work.
Can anyone help. I don't want to make wifi calls just use the internet at home and maybe at hot spots to retrieve e-mails now and again. I don't want to purchase a data plan from AT&T. My computer is wifi and I don't need a data plane to use it at hot spots why do I need a data plane to use AT&T. I paid full price for the phone and now AT&T tells me that to use wifi I need to pay $35. per monthe to use the wifi. It searches and finds my router which is linksys but won't pull a page. I even have bellsouth dsl. What gives with AT&T. My husband has T-Mobile and he can use his blackberry curve that is wifi and doesn't need to have a data plan

Will unlocking my blackberry 8120 make the wifi function work through AT&T or does unlocking the phone unrelated to to wifi?

Once you've connectedt to your wifi, you need to go to Options >Advanced Options >Browser and set the default browser to Wifi or Hotspot Browser.

Unlocking your BB will have nothing to do with wifi.