Soft reset your iPhone (turn off and turn back on)
If that doesnt work try hard reseting you iPhone (hold down sleep/wake button and home button until the apple logo apears- don't worry it doesn't affect your apps/music)
If that doesn't work restart your computer.
If that doesn't work then download the latest version of iTunes.
If you just recently got a new iPhone 4, connect it to iTunes and iTunes will identify it as a new phone. If you have previously synced your iPhone 3G with that computer before, then iTunes should give you the option to sync the new iPhone with a backup from your latest iPhone 3G sync. When you do that, your files from your 3G will be transferred to your iPhone 4. Hope that helps :)
You Have To Have Access To A Computer Well You Download Itunes Then Sync Your Iphone To There From Buying From The Itunes Store Or You Download Straight From Your Iphone Itunes By Buying Itunes Card Or Having A Credit Card
Through iTunes
Yes you can! The only thing is you need is the newest version of iTunes that works with it. For an iPhone 4 you need to have AT LEAST iTunes 10.1
Yeah, put it into Itunes and sync it with iphone
buy them from itunes
Almost all of the applications on the iTunes store is compatible with the iPhone 4. Exceptions are applications which are for the iPad.
IF you have a computer and have installed itunes on it (no duh you wouldn't have apps with out i tunes:P) all your apps, videos and songs SHOULD be saved on i tunes so just sync the iphone 4 2 itunes and there you have it. :)
You can without but the easiest generally do use iTunes.
It is on the packaging that the iPhone is in or you can check the available memory via iTunes or the handset.
What you do is you go and plug up ur iPhone to the iTunes and click on the update button
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