how to update ipod

Update it as described in this article; devices running an iOS version prior to 5.0 can't be updated straight from the device. It will be updated to the newest iOS release supported by the device’s hardware, which is iOS 7.0.4 for devices with at least 512MB of RAM.

The maximum iOS version for the original iPhone and first generation iPod touch is 3.1.3.

The maximum iOS version for the iPhone 3G and second generation iPod touch is 4.2.1.

The maximum iOS version for the third generation iPod touch and original iPad is 5.1.1.

The maximum iOS version for the fourth generation iPod touch is 6.1.5.

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To update

The Settings>General>Software Update comes with iOS 5 and later.

Connect the iPod to your computer and update via iTunes as far as your iPod model allows

iOS: How to update your iPhone, iPad, or iPod touch

A 1G iPod can go to iOS 2.2 via iTunes and iOS 3.1.3 via

Purchasing iOS 3.1 Software Update for iPod touch (1st generation)

https://buy.itunes.apple.com/WebObjects/MZFinance.woa/wa/touchLegacyLandingPage

- A 2G to 4.2.1. Requires iTunes version 10 or higher. If a Mac it requires OSX 10.5.8 or later.

- A 3G to 5.1.1 Requires iTunes version 10.5 or later

- A 4G to 6.1.5 Requires iTunes version 10.7 or later. For a Mac, that requires a Mac with OSX 10.6.8 or later

- A 5G to iOS 7. Requires iTunes 11.1 or later if you update via iTunes

Identifying iPod models