Why won't my lock button on my IPhone 4 work?

So, I came home today and my lock button wasn't working. Just wasn't working! It's stiff and it doesn't do anything. I tried holding in the home button but it goes to voice control? Ughh, what can I do?

This is a common fault in iphones after having them for maybe a year, it doesn't get easier

This happened once to me. Sometimes cases can put pressure on you buttons and mess them up. If your warranty hasn't expired then you can take it to an apple store or mail it there and they should replace it.

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