www.iCracked.com - iCracked, the world's best iPhone, iPod, and iPad repair company, shows you how to repair your iPhone 3G / 3GS with their Official iPhone ...
How To: Reassembly iPhone 4S | DirectFix.com
iPhone 4 Take Apart
iPhone 5 Teardown & Repair Directions | DirectFix
How To: Replace the iPhone 4S Battery | DirectFix.com