how do i get icloud on my iphone 3g

You need - at a minimum - iOS 5 to use iCloud on the phone.You will need to plug the phone into a computer running a current version of itunes to upgrade (it will upgrade to most recent version of iOS that is compatible with your device.

You don't. Requires iOS 5.0 or greater. iOS 4.2.1 is the end of the line for your phone, there are no further updates available.

It appears that the 3GS is the earliest model that will run iOS 5.

As has been pointed out

Message was edited by: James Ward4