How long it takes to learn mobile phone maintenance is relative. How long you study depends on where you study. There are 369 training courses. If you choose to participate in training institutions, the general study time is about 3 months. The charging standard of each training school in each city is different, because the curriculum and urban consumption level are also different. Take Rand School as an example. The practical course of mobile phone maintenance is 5800. Other schools may charge tens of thousands of dollars like this zero-based course. It's up to you to choose.