Q: i want to update

To update

Connect the iPod to your computer and update via iTunes

iTunes 10 for Windows: Update and restore software on iPod, iPhone, or iPad

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)

A 2G to 4.2.1. Requires iTunes version 10.X. That requires a Mac with OSX 10.5.8 or later. With 1OSX 10.4.11 you can only go to iTunes 9.X which gets you as high as iOS 4.1

A 3G to 5.1.1  Requires iTunes version 10.5 or later

A 4G to 6  Requires iTunes version 10.7 or later. If a Mac that requires a Mac with OSX 10.6.8 or later

Identifying iPod models

Who come I canno update my 4s

Hi how do i upgrade my iphone4 to the ios7.0.2 can you please help

With iTunes or with the Software Update feature introduced with iOS 5.

Method 1: Connect your iPhone 4 to a computer with iTunes open and let iTunes search for an update.

Method 2: Go to Settings --> General --> Software Update and hit "Download & Install"