Hi I just bought a 8320 last saturday and my wifi wasnt working so i brought it back to best buy and the guy there changed it from t-zones to hotspot. i got home and it still wasnt working so i called tech support and he told me to take the battery out. that worked but now i need to take the battery out all the time to get the wifi to work. i think i have a defective phone. im not going to take my battery out when ever i want to use wifi. my trackball also gets stuck some times and the actual ball wont move down. Is my phone defective? any help? thanks