Lock button is a known deffect!
While appreciate that most of you were under the year warranty and were able to get a replacement quickly, I think that for Apple to sell a $700 or $800 dollar phone that lasts just over a year is ridiculous.
I stuck my phone in a drawer for 3 months because my service was lousy (Sprint) and I wanted to wait fro LTE, so I only used my phone for about 10 months. When I started having problems with the button, I was less than a month out of warranty. My phone and case do not have a scratch on them and was in amazing condition, but the button was broken.
While in the Apple store, I discovered the guy next to me had the same problem with his 5 month old IPhone 5. He was happy, because they gave him a new on, no questions asked. I have since discovered that a coworkers brother and sister in law have the same problem. My buddy who owns a wine bar near my house had to listen to me rant Saturday night about it and promptly handed me his IPhone 5 and it was even worse than mine, it would not work at all, unless he jammed the phone up against the corner of the granite counter. While discussing it with another woman I work with, because I knew she had one and wanted to warn her to watch out if she still has a warranty to get it extended. She said her phone was okay, but another woman that overheard me told me she had the exact same problem.
My point it that this is clearly a defect and Apple should honor any phone for at least 2 years that comes back for this reason, unless I am misunderstood and I should be happy with a $800 phone that lasted a year.
I am disgusted and this may be my last Apple purchase.