How to Get Multitasking on the iPhone 3G Without Jailbreaking
- 1). Open iTunes on your computer.
- 2). Connect the data cable to your iPhone and an available USB port on your computer.
- 3). Select your iPhone from the "Devices" subsection on the left side of the iTunes window.
- 4). Click the "Update" button.
- 5). Click the "Continue" button to update your iPhone 3G's operating system. iTunes will prompt you when the update completes. You can now multitask using your iPhone 3G.