Why did my iPhone shut itself down and how do I get it re-activated?

[iMore Question]

why did my iphone shut itself down and how do i get it re-activated?

Had just sent some texts and there was plenty of charge remaining. When I checked my phone 5 minutes later, it wasn't working

 

[kch50428]

Re: why did my iphone shut itself down and how do i get it re-activated?

Plug it into the original charger with the original cable... and leave it alone for at least 3 hours.