My phone is the Tracfone (or StraightTalk) s390g from Samsung. i like this phone, but it has one flaw, the wifi. I finally got it to connect to my home wifi network, but when i try to use it, it will take forever to load and then sometimes just fail. The reveiws i read said this phone's wifi worked really well. is this something i can fix, or could my phone be defected?