My button on my iPhone is not working what do I do?

So my iPhone started not working I gave it back to the shop with the reseat but they said that they couldn't do anything so I don't know what to do please help

Well if its the power botton and it won't turn on then you have to plug it into a computer to turn it on but if its the home button or the volume then you go to settings. Then go to general then accessibility then at the bottom where it says assesive touch turn it on and then a little bubble will pop up with all the functions you need

The kevin guy is right but he fogot to mention ttat you can use int to lock your screen and turn off the phone and yea it basically does everthing and more than what the buttons do i have to use it on my iphone.

Recalibration of the iPhone Home button explained in the following: http://www.ihelplounge.com/how-to-recalibrate-iphone-home-button-with-keyword-shortcut/

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