The Components You Need to Learn Before Phone Fix Mobile phones are more and more essential in our daily lives, it's very common to keep a cell phone even for old men now. Therefore, cell phone fix industry becomes very popular. If you are a beginner in the field, before learning how to fix mobile phones, it's also very important for you to learn how to identify different components on the PCB of a mobile phone. Of course, it's not so difficult to identify these cell phone components. For different mobile phone brand like Samsung and other China mobile phone motherboard, there are 2 parts included: power section and network section. It's important to remember these two parts when you identify electronic components and integrated circuits on the main board of mobile phones.