iPhone 4s will no longer connect to or pick up ANY wifi networks
Recently my iPhone 4s has stopped locating or connecting to ANY wifi networks what so ever. When I go to turn the wifi on, it will not locate anything. My home wifi will no longer be shown, along with any other wifi network that I normally connect to. I have researched everything, and tried every troubleshooting solution people have suggested. I am unable to manually enter information to connect to wifi because no wifi will even show up. i brought my iPhone to the apple store, and they did not know what was wrong with it. They opened up my phone, and said that everything looks great, and that the have no solution for me other than buying a new phone because I am no longer within the one year warrant. I am desperate to get this fixed as I am going over on my data, and don't want to have to pay for a brand new iPhone. I amy hoping somebody knows what could possibly be the problem, because everything I have seen in previous posts will not help me.
Any suggestions would be great.
Thank you!