The most popular glass-built smartphone isn’t indestructible in nature, normally the iPhone 4 could be dealing with broken display, dock connector and home button malfunctions, and almost dead drained battery. Consumers normal approach could be throwing the unit to the nearest Apple Store for repair. But what if you have misused or abused the unit for it’s injuries and Apple charges you with crazily unwanted dues for the repair? Now it’s time for you to take the repair by yourself. And all you need to do is follow this detailed step-by-step repair-guide worked by the guys at Gizmodo and iFixit.