I have a few iPhone devices for development purposes. The 4S has been a disaster. The first one had its wifi suddenly disabled (greyed out). Apparently it has some sort of temperature sensor for the wifi unit, (which only got enabled with iOS 6 or so IIRC) that tends to malfunction and disable the wifi. The following two units eventually had the same thing happen to them. Of course I had to pay for them because I was out of warranty. It is a quite widespread issue judging from the numerous forum posts, but Apple does not acknowledge it as a hardware failure - their instructions call for resetting network settings or a full restore of the unit which does not work. What does work is, quite interestingly, putting the phone in the freezer, but it does not fix the issue permanently. Apple is a special case though, due to the fact that the average Apple customer behaves like a member of a cult. For example, my boss had his 6-month old Mac Mini warranty voided because they found "dust" inside (it was in a pet-free, smoke-free office in case you are wondering). I told him that they can't do that, even if they did find "dust" it is not in their listed reasons to void a warranty and he simply answered "no, it is official, they told me so at the genius bar and gave me 10% off a new mac mini so I got one". So they usually get away too easily with bad hardware, like the low quality "superdrives" that would fail left and right, the aforementioned wifi module etc. I don't know if they are sleazier than everyone else, they sure are sleazy as hell but the difference is that the majority of their customers thinks they are infallible...