If you are like me and run a stock standard Apple iPhone 3G and by that I mean an Apple iPhone that is not Jailbroken, then you may have noticed sometimes the phone can be slow.

Usually after a reboot the phone will be pretty snappy, but we all know how long it takes any kind of smart phone to reboot, although the I find the Apple iPhone relatively quick when compared, but overall a bit slow.

Here are some useful things to know about the Apple iPhone OS.

In general when you run an app and then close it it has been removed from memory, however I learnt this great trick.

If you are in any app and you hold the power button down until the screen darkens on your Apple iPhone and you are prompted to either shut down or cancel. At this point the only button you need to push and keep pushed is your “home’ button. You will notice after about 3 seconds the iPhone freezes and then the app that was running is ejected from memory.

When next you are finding your Apple iPhone 3G is not performing as you know it should open Safari and perform this trick. (It is always a good idea to clear web pages you are no longer using in Safari)

As far as I know these are the only memory resident programs that run simultaneously with the OS. Along with the “phone’ app.

You can do this with your mail application and with iPod app. After this you will find your iPhone should perform much quicker.

Hope this helps