1. Generally, the relatively large mobile phone maintenance training institutions are still credible. The main purpose of participating in mobile phone maintenance training is to inspect the training institutions on the spot. Don't just watch online advertisements or listen to the nonsense of the admissions staff and blindly run over to pay the money, and finally learn nothing.

2. If you want to be a master of mobile phone maintenance, you can't look at drawings and analyze circuits. You are not a good mobile phone repairman at all. You can only be an experiencer at most. You will only rely on your long-term accumulated experience to maintain, but you don't know why the real maintenance ideas and principles. With the rapid development of science and technology, if you can't understand the working principle of the whole mobile phone, you may be dumbfounded even if you can repair it, change it and change its fault!

3. Understand the knowledge of various components of mobile phones, including the identification of various components in mobile phones, learn and understand the principles of various components, and master the measurement methods of components.

4. Understand the circuit principle, working principle and basic circuit knowledge of mobile phones, such as the principles of amplification circuit, oscillation circuit and switch circuit, understand and master the component characteristics and circuit structure of mainstream models in the market, and understand the working principle and circuit composition of mobile phones.

5. Including: receiving circuit, transmitting circuit, frequency synthesis circuit, logic circuit, power supply and charging circuit, interface circuit, which should be understood in blocks. Starting from the most basic electronic unit circuit, learn to read and draw pictures, learn to analyze the working principle of the basic circuit, and analyze the circuit step by step along the signal path from input to output.

6. To find out which signals are contained in the key points of the circuit, we must know their normal waveforms, amplitudes, voltages and working frequencies, and also find out the functions of circuits at all levels and the functions of various components in the circuit.

7. Use of mobile phone maintenance tools and instruments. Including air guns, soldering irons, multimeters, oscilloscopes, frequency meters, etc. Master the disassembly and welding technology of mobile phone components.