Can iphone4 customize SMS ringtones? How?

When you go to the next iTools (iTunes must be installed before you can use it), there is a network resource-ringtone-the best ringtone network, in which there are many SMS ringtones to download ... just import them directly into your mobile phone after downloading. ....

You can also customize the meaning-open iTools, there is a ringtone library in the local resources, click Make ringtone, intercept what you want (no more than 25 seconds), and then save it. You can see the ringtone you just intercepted in the ringtone library, and then right-click to import it into XXX equipment. Ok .. turn to the ringtone of your mobile phone message again ... hope to adopt it.