So, I recently bought an unlocked Blackberry Curve 8520 from Newegg. Before I put in the SIM, I tried out the WIFI feature and it worked awesome. When I put the SIM card in, that's when my WIFI stopped working. I have T-Mobile and whenever I use the browser it always transfers me to the Home Page, telling me I have to purchase the web2go plan. Currently for my old phone, I don't have any data plans except for unlimited texting. WIFI is supposed to be free no matter what from what I understand like if you are connecting to your own router from home. I don't understand why it doesn't work anymore once I insert my SIM card. Does any one here know how to fix this problem? Sorry, I am new to Blackberry and the forums itself. Any help would be greatly appreciated.