I am disheartened to see many other folks posting the same complaints about the same issue I seem to be having. The other day my wifi and Bluetooth features of my iPhone 4s suddenly stopped working. The wifi is greyed out and the bluetooth just keeps spinning and won't turn on or off. I use both features regularly and can't afford to be without them even for a short while. I have reset the phone from scratch, run it down dead, cooled it in the refrig to no avail. What to do?