Smartphones have a screen timeout built into them, which works in the same way as a screen saver on your PC, temporarily suspending the screen or making it appear black while the device is not being used. This a great function, as it ensures the display isn't draining your handset's battery.
Adjust how quickly your screen fades to black
However, you may find this may be just a little too quick, and you find your display is timeout while you're still using the handset, or it's just simply too long and your display is remaining active and drinking your power when it needn't be.
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Fear not, there is a way to alter the default to a timeout period that suits you better. While you can't specify your own unique timeout period (for example 32 seconds) you will be able to choose from increments, which in the case of the iPhone ranges from one minute to never.
Here's how to adjust the screen timeout period on an Apple iPhone.
From the Home screen select Settings
Choose General and then press the Auto-lock option
From the timeout options displayed, select the one you require. A tick will appear next to it when it's been selected. Now press the button labelled General at the top of the screen to return to the General settings.