The iPhone is a smartphone with many advanced features that make it more like a mini computer than a cellular phone. One of the features it offers is to automatically wake from sleep and sound an alarm. You can use this feature like an alarm clock or to remind you about an important event. It is also possible to adjust the amount of time the iPhone will wait before it automatically goes to sleep.
Set the Alarm
Click the home button and move your thumb across the slide bar to open the iPhone. Navigate to the "Clock" icon on the touch screen menu.
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Tap the "Alarm" tab on the Clock menu to bring up a list of any current alarms on the phone.
Tap the plus (+) sign to add a new alarm.
While creating the alarm, tap the repeat tab to choose how often you want the alarm to repeat itself. You can set it up to automatically wake the iPhone from sleep and set the alarm off at a specific time each day.
Click "Save" and you will see the newly created alarm along with the "repeat" info underneath the time.
Delay Sleep Mode
Click the home button and move your thumb across the slide bar to open the iPhone. Navigate to the "Settings" icon on the touch screen menu.
Tap the "General" tab in the Settings menu to bring up another list of options.
Tap the "Auto-Lock" option to get a menu of how long the iPhone will wait before going to sleep. You can delay the time up to 5 minutes or choose to never let the phone go to sleep.