Identification of refurbished machine: Enter # 06 # when the mobile phone is in standby state, and a string of numbers displayed by the mobile phone is the serial number of its motherboard, so write it down; Remove the battery of the machine and look at the serial number on the white label in the two labels behind the fuselage, that is, the serial number of the casing. The other label is usually the network access license. Whether it is consistent with the previous figures; Look at the IMEI number on the box of the machine and compare the three to see if they are all consistent. If the serial number of the motherboard is different from the serial number of the chassis, then the machine is probably repaired or assembled, so don't buy it. If the three serial numbers are the same, plus the network access license, it can basically prove that the machine is genuine, but it can't be 100% sure, because JS can fake anything now, and the serial number of the motherboard can be written by computer and software, and fake serial number labels and network access licenses can be bought for a few dollars. For the sake of caution, we should continue to verify according to the following methods. 3. Look carefully at the battery lock of the fuselage for dial marks, whether the sim card slot and contacts are worn, and whether there are contacts on the MMC card. 4. Look at the packaging and instructions of the machine: the packaging and instructions of the regular new machine are beautifully printed, mostly on coated paper, with clear fonts and images, and a sense of hierarchy, while the counterfeit packaging boxes are mostly copied on simple one-sided paper, with rough fonts and images, blurred printing handwriting, and many instructions modified by informal channels are even copied. There are also some refurbished machines that use original packaging boxes and instructions, but after all, the machine is old, the packaging boxes must be worn, and the instructions must have traces of use. You can find it when you buy it. 5. Look at the network access license: there is a watermark on the network access license, and the surface color is uneven, with deep and shallow, thick and thin; Most of the fakes are imitations, and the surface color has not changed. If you can't see it, you can also use the money detector to look at the network access license. If there is an anti-counterfeiting pattern inside, the red "CMII" pattern will be displayed. The false pattern is blurred. Real network access licenses are generally printed with a stylus printer, and the numbers are clear. Look carefully at the dent made by the needle, but the fake network access license is printed by an ordinary printer. The numbers are not very clear and there is no dent. Generally speaking, it is difficult to fake the network access license, after all, the equipment cost required for fraud is relatively high. In addition, you can also check the authenticity of the network access license through online inquiry, which will not be explained in detail here. 6. Look at the shell of the mobile phone again: when you open the new mobile phone, you will obviously notice that the "key parts" of the mobile phone are covered with film for key protection, such as the inner screen, the outer screen and the camera. As long as these parts touch, they will leave fingerprints. Don't listen to JS's explanation when you see the fingerprints on the mobile phone. In addition, dust and traces of use are inevitable when renovating machines. The gap between the upper and lower casings of the machine (generally around 1MM), the gap around the keyboard, and the charger slot are all places that are easy to "hide dirt and shelter dirt", and the rotating shaft of the clamshell machine will also leave traces of use, so special attention should be paid. Generally, the shells used in refurbished machines are original or carefully processed old shells, so the front and rear parts of the machine shell are easy to close loosely and have a large gap. The identification method is to try to insert your fingernail into the seam between the upper and lower covers of your mobile phone. If it can be inserted, it is to assemble the shell. For machines that don't replace the shell, JS sprays it with water mist similar to detergent before selling, and the surface of the old shell immediately presents a matte effect similar to that of the new machine. If you don't look carefully, JS will get away with it, but it won't take long for the shell to be painted. 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 carefully, you will find that a small particle is dust. If it is a clamshell machine, you can also check the seams of the clamshell machine, because sometimes, even if JS handles the surface of the machine well, these places will inevitably leave some traces of dust. In addition, check whether the screws of the fuselage are brand new and whether there are any traces of screwdriver screwing. More importantly, many new mobile phones have obvious sandalwood smell, while old mobile phones and shell changers generally do not have this smell, or the smell left during processing, while new phones will have sandalwood smell, which is different from ordinary detergents and perfumes. The body can't have sticky wax and oil (if there is, it is beautified by JS). 7, look at the screen sticker: the brand-new one should be posted very well, there are no bubbles anywhere, one integrated mass. 8, look at mobile phone accessories: regular manufacturers of new machines have a full set of original accessories, at least one charge. The accessories of refurbished mobile phones are generally incomplete or not original. Before buying, it is best to go to the relevant website to find out what the original accessories are standard, so as to avoid JS buckle accessories. In addition, there are scratches on the plug of the matching charger and earphone. Generally, the old machine must have been charged, but you can still see the difference. See if the phone headset is black. If so, it may be refurbished or used. 9. Look at the records: Look at the records of games, short messages, phone books, call records, homemade ringtones, WAP and voice functions, call records and other items in the mobile phone. If so, there is a great suspicion of renovation. In addition, during normal use, the machine frequently shuts down or crashes automatically, which can definitely be said that there is something wrong with the motherboard or software of this mobile phone. 10, depending on the price: before buying a mobile phone, it is best to find out the price of the mobile phone in the local newspaper or website. If the quotation is very cheap, be on your guard. Such a "cheap" mobile phone is either a refurbished mobile phone, an informal channel product, or an accessory that is "short of weight". Host authentication method: 1, outer packaging box 1) The packaging boxes of new mobile phones are brand new, that is, there is no dirt or handwriting on the packaging boxes. And there is no re-labeling-especially the label with IMEI code (because some mobile phones are repaired, manufacturers label them and merchants resell them). 2) prevent mobile phone smuggling; The box should be marked in Chinese, including product name, model, factory name, address, contact number and other information. If the English logo on the box is incomplete, it may be a smuggled mobile phone. 3) prevent replacement of accessories; If the box is sealed, remember to unpack it yourself and tear the seal (because some businesses use a hair dryer to unpack it, and scraping the seal is invisible), so that you can check whether it has been unpacked. And some merchants deliberately unpack in front of you, which is generally a fake action of the merchants. In fact, the packaging may have been unpacked and the internal accessories have been replaced. What you see is "unpacking", so you won't have doubts. 2. After unpacking the standard configuration, check the category and quantity of the standard configuration of the manufacturer first. Generally, it should include: body, battery, charger, earphone, waist clip, product instruction manual, warranty card, accessories instruction manual, etc. What needs to be emphasized here is that the warranty card is the guarantee for the after-sales service of each mobile phone. If there is no formal warranty card from the manufacturer, don't buy it. Some mobile phone warranty cards also indicate the body code, pay attention to check whether it is consistent with the body code marked on the packaging box. 3 Body "smell": Generally, the genuine mobile phone body, especially the battery, will have a strong sandalwood smell, which can last for 3 days to 1 week after unpacking, but the fake can't do this painting process, so there will be no sandalwood smell. In addition, the bad taste is only pungent. 1) requires shell replacement on the spot. When disassembling the shell, please carefully check all the parts that can be seen, and be clean and seamless; 2) The keyboard of the new machine feels tight when pressed. If you are more comfortable and elastic, you should be careful. 3) Check whether the phone head is worn or fingerprinted, whether the screen protective film is flat and whether the back cover is loose.

Identification of battery, charger and earphone: 1. The color of the packaging skin of the original battery is dark, which is matte paint, and the color of the assembled battery is bright, because it contains fluorescent powder in the middle. 2. When you buy a battery, you can push the edge of the packaging skin with your nails. The original electricity will not be stripped, and the group electricity will definitely. 4. The contact color of the original battery is sub-light. If it is not bright, the battery will be scratched once used. Generally, the labels on licensed mobile phones sold in Chinese mainland are printed in simplified Chinese, while many parallel batteries are sold abroad, so the labels on them are all in English. Some sellers use fake batteries instead of real batteries, and the real batteries are also printed with Chinese. However, the fake battery is very rough in workmanship, while the real battery has a neat appearance and no redundant burr. The outer surface has a certain roughness, and it feels comfortable. The inner surface feels smooth, and subtle longitudinal scratches can be seen under the light. Moreover, the handwriting of the real battery label is clear, the battery label corresponds to the battery type, the font outline of the manufacturer is clear, the brightness of the anti-counterfeiting logo is good, and the appearance is three-dimensional. 6. The original electricity price is generally not lower than 100. If the price is low, you should pay attention. Nokia headphones are different from ordinary headphones. When you buy them, you are optimistic about the quality. Authentic headphones are very fine in workmanship. That's all, but shopping should pay attention to the following points: 1. Try the machine: the seller usually agrees to let you try the machine, but usually gives you a fee card to make a phone call for free. Remember not to use their cards at this time. Call your friends with your own card to try the call quality. Be sure to try more and try for a long time. After leaving the counter, check all aspects of the machine for problems. 2. When testing the machine, remember to take all-black photos, or take all-black photos by hand to see if there are any bad spots on the screen. This bad spot is divided into many colors and will keep shaking. Although it won't affect the use, your screen won't last long. I hope it will help everyone.