You can update your 4th gen iPod Touch to iOS 6 in two ways. If you are on iOS 5, you can do it wirelessly from Settings>General>Software Update. If are running iOS 4, you have to plug your device into an iTunes-authorized computer and accept the pop-up to download and install the latest iOS software. Either way, there will be waiting involved, especially if you have a slow connection.
Sadly, no. The latest version of iOS for the 4th Generation iPod Touch is iOS 6.1.5.
You can update it to iOS 5 the same way you update it to any other iOS version. The 4th generation (and indeed the 3rd generation) iPod Touch can be updated to iOS 5.
No, the update is only for iPhone 4, iPod touch 4, iPad 1, iPad 2. The highest version iOS Firmware for the iPod Touch 2G is 4.2.1.
You do not get iOS 4.0.2 when you update an iPod to iOS 4.1. iOS 4.0.2 is an earlier version and precedes iOS 4.1. The next version after iOS 4.1 will be iOS 4.2.
If you have an iPod Touch 3rd generation, you can easily update to iOS 5.1.1 by plugging in your device to your iTunes-authorized computer and waiting for the pop up to download and update to the new software. If you are already running an earlier version of iOS 5, you can update wirelessly by going into Settings>General>Software Update. If you have a 4th generation iPod Touch, then you must update to iOS 6 because you are always forced to update to the latest iOS version available. I you have a 5th generation, you cannot downgrade to iOS 5.1 because that is not legally allowed by Apple and requires hacks.
no only on the ipod touch 5th gen
Only certain model iPod touches are capable of supporting iOS 4.3. The minimum iPod touch capable of supporting iOS 4.3 is an iPod touch 3rd generation, from 2009. The highest iOS that this model iPod touch supports is iOS 5.1.1.
You cannot
No
You need to connect your touch to the computer, then open iTunes then select update. This will update your device.
Only the iPod 4th generation can be update to iOS 6. You can update from 4.3.5 by plugging your iPod into your iTunes-authorized computer and accepting the prompt to download and install the new software.
There is no iPod Touch 5th Generation. The iPod Touch 4th Generation runs iOS 5.