My iphone 4 switched itself off and wont come back on
i looked at the maps app on iphone4, half hour later my phone sounded a tune i havent heard before.. I checked it half hour later and my phone is off! Will not come back on! Ive tried charging it but nothing whatsoever!! Please help! Can i still get pictures and contacts off it? last back up was before xmas! Not sure what the settings were when it comes to icloud... has anyone had the same experience of phone turning off? Is there anything i can do? Please help! Thanks
iPhone 4