With your iPhone always by your side, you no longer need a separate alarm clock to help you wake up at the right time every day. Like many other common tasks, setting an alarm on your iPhone can be done not only by tapping the relevant menus and settings, but also by speaking to the voice assistant program Siri. Because Siri is programmed to understand normal sentences, you can simply tell your iPhone to wake you the same way you would tell a friend.
Press and hold the "Home" button until Siri activates.
Tell Siri when you want to be woken up. You can also tell Siri to set the alarm for multiple days, although this is optional. For example, you can say "Set an alarm for 8am tomorrow," "Wake me up in 8 hours," "Wake me at 7am every weekday" or "Wake me up at 11am every Sunday."
Check the screen
Check the screen to confirm that Siri understood you correctly and set the alarm for the right time.
Siri can't set an alarm more than one day in advance -- if you try, Siri will offer to set a reminder for you instead.
You can also tell Siri to show you all alarms, change a specific alarm to a different time, and turn off or cancel a specific alarm or all of them.
Information in this article applies to the iPhone 5 running iOS 6.1. It may vary slightly or significantly with other versions.