Hi I got this phone and when I first got it the only issue was that the wifi was Grey and blocked out at the time it was ios 7 but I updated it and did the blow dryer freezer trick it worked then every time the trick got weaker and weaker because the wifi went from days to cutting off from the trick to seconds today. Now the phone die at 80% or higher and I just upgraded to ios 9.3.3 but anyways im going to buy a new battery and Wifi antennae will this work? Any other advice ? Thanks