Just like on desktop computers, iPhone programs can sometimes crash and lock up your system. And this can be pretty frustrating – sometimes more frustrating even.  These  are rare on iPhones, but when they do show up, it’s important to know how to force quit iPhone programs.  In this excerpt from Take Control of Your iPhone, We cover iPhone freezes and hang-up, explaining what’s going on, how to recover from them, and how to avoid them.

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How to force quit an application in iPhone OS 1.x and 2.x

Step

To force quit an unresponsive app all you have to do is press and hold the Sleep/Wake button until you see the red slider.

Normally, this is what you would do to power down your iPhone or iPod touch. In this case however, when the slider appears, release the sleep/wake button and then press and hold the Home button. If it works correctly, your iPhone will forcefully quit the unresponsive app and return you to your home screen.

How to force quit an application in iPhone OS 3.0

You can easily force quit an application in iPhone Firmware 1.x and 2.x while it hangs up by holding down the Home Button for a few seconds. But is the latest and greatest iPhone OS 3.0, Holding down the Home button for few seconds activates the Voice Control.

Actually the Force Quit an application feature is still there but requires some additional steps to perform.

Steps

1. Press and hold the sleep/wake button until the slide to power off screen appears

2. then press and hold the home button until the application quits (5-6 Secs)

All iPhone 3GS users will require to perform the above mentioned steps to force quit an app in iPhone OS 3.0. For iPhone 3G and original iPhone, there’s no Voice Control so Force quit and Application will remain to holding Home Button.

Fixing an iPhone White Screen Problem

When your iPhone displays only white on its screen, this is clearly a problem. Here We are describing three steps to fix it.

1. Restart the iPhone by holding down the hold button at the top left of the phone until a red slider appears onscreen. Slide it to turn the phone off and, when it’s off, turn it back on again,
2. Reset the iPhone by holding both the home button and the hold button at the same time. Do this until the screen flashes and the Apple logo appears.
3. Restore the iPhone from Backup of its data. Sometimes files on the phone get corrupted and need to be replaced with older.