Apple diagnose option
Title : Nothing but praise from me
Comment : My iPhone 4S lost its wi-fi permanently after twice recovering after resets. Bluetooth still worked, which to me indicated that the radio chip worked. I found an on-line repair website that claimed to repair this fault within a day or two, sent the phone to them, and after a week rec'd a msg. to say they tried everything (including a reset), but couldn't fix it. They said they'd ordered a new wi-fi aerial. After another week and an E-mail or two, they told me they couldn't fix it, that they couldn't do soldering, and that any repair would be uneconomic. They returned the phone (we are still waiting for the refund). Meanwhile, I found Console Wizard, noted that they specifically had the proper soldering equipment to re-do Apple's dodgy lead-free solder (if required), sent them my phone for diagnosis (I couldn't make an assessment), and it was fixed in half a day. It also was £10 less expensive. A highly recommended duly deserved.
(Apple diagnose option)