anytime i have my phone connected to ANY wifi it sticks/freezes up, Wont process anything. any App i am using just hangs there. then sometimes the having issues screen pops up and askes me if i want to canecl or wait or I have to hold the power button in long enough it does a restart to get it to do anything. but if i take my phone off wifi it works fine. At home and work i have excellent connections. So i know that is not the reason. Any Suggestions?