If the iPhone is frozen and can't be restarted in the normal way do the following. Press and hold the Sleep/Wake button and the Home button simultaneously for at least 10 seconds. The red slider may appear and the screen may dim but don't release the two buttons until the Apple logo appears.
People also ask, how long does it take to turn on a dead iPhone?
If I plug it into a wall socket it takes about 3-5 minutes (it shows the red battery with power symbol below) to turn back on, but if I plug it into my laptop it understandably takes longer. Occasionally once it has finally powered back up the battery percent will be more than 1%.
What does an iPhone look like when charging from dead?
As your device charges, you'll see a lightning bolt beside the battery icon in the status bar, or a large battery icon on your lock screen. A picture of a battery colored with red indicates your battery is near empty. The level of green that appears in the battery indicates how close to a full charge you have.