How to renovate the mobile phone? How is the mobile phone refurbished? Is there a tutorial?

It's no use looking at the serial number.

There are several ways to identify refurbished machines:

1. If the chip in contact with the battery on the mobile phone is an unused chip, the contact surface is frosted, otherwise it will look shiny, which is caused by too much friction and has obvious wear marks.

2. Shell, the shell commonly used for refurbished machines is original, so the front and rear parts of the mobile phone shell are easy to close tightly, leaving a big gap. The identification method is to insert the little finger nail into the seam between the upper and lower covers of the mobile phone! If you can plug it in! Is to assemble the shell, for those mobile phones that have not changed the shell, spray a layer of mist like a cleaner, and the surface of the old shell will immediately appear a matte like a new machine. Most buyers can get away with it if they don't look carefully, but after a long time, the paint on the shell will fall off. When buying, you must carefully observe the shell, because JS technology is no matter how good it is, and it is not as advanced as the original equipment. If you look closely, you can see some particles (dust, which is caused by not working in a vacuum room when painting).

3. Keyboard and Interface Due to the long-term plugging and unplugging of the charger plug, the charging interface of the refurbished machine will have black scratches, and the refurbished machine mostly uses the keyboard on the old machine or the imitation keyboard! This kind of keyboard feels soft! Not as strong as the new keyboard.

4. Charging, preferably for a long time, usually 10 minutes or more. Because there are many refurbished machines that will run out of power after a long charging time. This is also a very effective way to judge the refurbished machine.

5.SIM card chip contacts are the same as battery contacts, which cannot be replaced by JS! Therefore, it can be seen that the refurbished machine has obvious contact and friction marks.

6. Fixed screw, the fixed screw part can't completely judge the authenticity of the mobile phone yet! But it can also be used as a reference, mainly to see if there are obvious scratches on the contact surface between the screw and the blade. If there is, there is no need to judge anything else! No, just look at other identification methods.

7. The price is very low because the spare parts of refurbished machines are all early products with poor quality. If you encounter this kind of mobile phone that is ridiculously low in price but is called parallel imports by merchants, you can basically conclude that it is a refurbished machine.

8. Quality: After the previous precautions are passed, it is a trial run, and JS is happy to let you try. Usually, he will give you a card and have no money to call the service desk. In fact, you can take a card with you and call your friend (landline) to ask him how the call quality is. Roaming cards are the best. Because the service desk generally can't detect the cell phone signal. Then see if the fonts on the screen are clear and have burrs.