I just had to think of a recent Apple store experience. We just signed up with a cellphone carrier, so I got a new phone (don't you just LOVE those discounts?? ), and I gave my son my old ancient iPhone. Well, my new phone wouldn't connect to our WiFi, and my son's phone got stuck in recovery mode when I tried to wipe it out and restore it.
So, we went to the Apple store, seeking advice. We got to deal with two different "experts", one looked at my phone, the other at my son's. The guy looking at my phone just told me I had to select something like "WAP2" when trying to connect to WiFi. He didn't actually look at my phone. The other guy hooked up my son's phone to a computer and tried to restore it. Surprise, surprise, didn'dt work. So he said he didn't know what was wrong with it, that it was probably not fixable, that I could *try* to take it to the corporate Apple store, and that those "geniuses" might be able to figure it out.
Home we went. I tried to connect my phone again, just to discover that there is no option "WAP2". So, I did a google search for my problem, that apparently many others had too, and I fixed it myself.
Then I did a google search for "Error 1015", which was what my son's phone had. And guess what, I found the solution for that too. Seems to be quite common, but the Apple "expert" had no idea what it was. It took me a bit longer to fix it, it was a bit more complicated, but I did it!! Works fine now.

I told my husband I should get a job at Apple, since those people have no clue what they're doing.