iPhone Repair Guides - United iPhone Repair
Part 1 - How to tear down an iPhone 4
Part 2 - How to put your iPhone back together and the new screen assembly on.
How to Open an iPhone 3G/S Without a Suction Cup
How to test an iPhone 3G/S Home Button
iPhone 3G & 3GS Top Flex Cable (Vibrate, Power, Volume Buttons and Headphone Jack) Replacement
View Part 2 Here
iPhone 3G & 3GS Glass Screen Replacement Guide
How to Assemble an Otterbox Replica Case