Why won't iphone sleep/wake button work?

It worked completely fine yesterday and now it won't.haven't dropped it and it hasn't given me a problem before.

Take it to the Apple Store. Or go onto Settings, General, Accessibility. Scroll down to Assistive Touch and select On. You will then have an on screen lock button, home button and many more.

  • Why doesn't my iphone's sleep/wake button not work? So my iphone's sleep/wake button feels weird.whenever i push it, it feels like i have to push it harder for it to work. Can i fix this by myself or do i have to get it repaired? And if i do have to get it repaired, how much would it be because i don't have warranty on it.
  • My iPhone screen is all black and my power / sleep button doesn't work. What do I do? I clicked on this app & my phone turned all black all I could see was the status bar and that's it & I pressed the home button but it stayed frozen, it didn't work. & well my power button doesn't work so yeah and then my iPhone locked and now I press the home button and Siri works and everything but my phones screen is still black!
  • My iPhone 5s sleep/wake button quit working and it's new? I got this like 4 months and it has quit working completely, since I didn't break it will they give me one for free under insurance or warranty
  • Jammed iphone 4s sleep button? Well recently today, my iphone sleep button all of a sudden got hard to press down on. It hasn't been water damaged or cracked or dropped in that area. Does anyone know why this happens and how much a repair would cost?