my wifi doesn't connect anymore. I know its not my router because my friends iphone can connect as well as all of the other things in my house that use wifi. Somtimes (like once a day) it will connect for a minute or two but then it will be gone. I've reset my phone, reset my network settings, etc. I think I need to replace my wifi antenna but I want that to be the last option. I don't really want to open up the phone. has anyone else had this happen or replaced their wifi antenna? let me know your thoughts/suggestions.