What do you need to bring to Huawei customer service center for

2. It can be repaired at Huawei's repair site. As long as it hasn't been removed or there's no water in it, it should be OK

3. After sales, you just need to bring your mobile phone
because after taking the mobile phone, we will be under the guidance of the service personnel, they can query the warranty time range of the mobile phone.

4. Don't be a liar

5. I have the same problem

6. Who says P2P is not safe? You need to know more about it. There are still good platforms. For example, calf online, which you said, has been investing and has never had any problems.

8. One. Your understanding is right. But gravity also converts work into kinetic energy. Two. When electric current does work, it can also be changed into mechanical energy. For example, the electric motor has both heat and mechanical energy. Three. The key to doing work is the angle between F and s. Ampere force can do positive work. The ampere force you said is always opposite to the V direction. If there is a power supply in the circuit, the current can not only be inced current. It is suggested not to have such a mechanical understanding, otherwise it will become more and more chaotic! 1. The current here is understood as inced current, but the ampere force only needs current. Don't leak. 2. "External force overcomes ampere force to do work" can be understood as: Ampere force does negative work, so electric potential energy increases and electric energy increases.