How to see if a mobile phone is second-hand?

Second, mobile phones and refurbished mobile phones actually collect the original movement, shell or outer packaging for maintenance or processing, and then sell them as new machines. The general software of this machine is not stable enough. These second-hand machines all have the same feature, that is, they can't enjoy after-sales service like regular licensed products. The following is the experience of how to identify second-hand mobile phones. ?

Look at the serial number (IMEI)?

The serial number of a mobile phone is just like the ID card of a mobile phone, and each mobile phone has a unique IMEI number. Generally speaking, it can be used to judge whether a mobile phone is genuine or not. The identification method is as follows: when the mobile phone is in standby state, enter * # 06 #, and a string of numbers displayed by the mobile phone is its motherboard serial number, 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 chassis, and the other label is generally the network access license). Whether it is consistent with the previous figures; Check the IMEI number on the box of the machine again and compare the three numbers to see if they are all the same. 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 everything now, and the serial number of the motherboard can be written by computer and software, and the fake serial number label and network access license can be bought for a few dollars. ?

Look at the machine packaging and instructions?

The packaging and instructions of regular new machines are beautifully printed, mostly on coated paper, and the fonts and images are very clear and layered, while the counterfeit packaging boxes are mostly simple one-sided paper imitations, 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 genuine packaging boxes and instructions, but after all, the machine is old, the packaging box must be worn, and the instructions must have traces of use. If you pay more attention when buying, you can find them. ?

Have you seen the network access license?

There is really a watermark on the network access license, and the surface color is uneven, 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 look at the network access license with the money detector. There is really an anti-counterfeiting pattern inside, and it will present a red "CMI-I" pattern. The fake pattern is blurred. The real network access license is usually printed by a pin printer, and the numbers are clear. Look carefully at the dent caused by the pin, 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 forge a network access license. After all, the equipment cost required for counterfeiting is relatively high. In addition, you can also check the authenticity of the network access license through online inquiry. ?

Look at the phone case?

When you open a new machine, you will obviously notice that there are films on the "key parts" of the machine for key protection, such as internal screen, external screen and camera. As long as these parts touch, they will leave fingerprints. When you see the fingerprint on the new machine, no matter how JS explains it, don't listen. In addition, dust and traces of use are inevitable when renovating machines. The gaps between the upper and lower casings of the machine, the gaps around the keyboard, and the charger slots 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 whether it can be inserted into the seam between the upper and lower covers of the mobile phone with your fingernail. If it can be inserted, it is an assembled shell. ?

Looking at mobile phone accessories?

The new machine of the regular manufacturer has a full set of original accessories, at least one charge and one charge. Second, the accessories of 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 prevent JS from deducting accessories. In addition, if you find scratches on the plug of the matching charger and earphone, then this phone is probably not brand new. ?

Look at the usage records?

See if games, short messages, phone books, call records, homemade ringtones and other items in the mobile phone have been used. If so, there is a great suspicion of renovation. In addition, during normal use, the machine frequently shuts down or crashes automatically, so it can be said with certainty that there is something wrong with the motherboard or software of this mobile phone. ?

Did you see the warranty?

Ask the dealer about the warranty period of the machine and ask for the official invoice. Second, mobile phones can't enjoy all the rights and interests stipulated in the "three guarantees" of regular mobile phones, so there is generally no warranty period or a relatively short warranty period. If the seller says they are responsible for the warranty, they can't agree, because regular mobile phones are generally guaranteed nationwide. If the seller can't do this, then there must be something wrong with the mobile phone. ?

See the price?

As the saying goes, greedy for small and cheap, eat big losses. Before buying a mobile phone, it is best to know the price of the mobile phone in the local newspaper or website. If the price quoted by JS is "very cheap", you should be vigilant. Such a "cheap" mobile phone is not a second-hand mobile phone, nor an informal channel product, nor an accessory. It is recommended to buy a mobile phone in a regular store with good reputation and good service. The three-guarantee certificate, valid invoice and three-guarantee card are complete. In this way, the legitimate rights and interests can be guaranteed when the machine has problems. ?

Second, the identification points of mobile phones:

1. Is the shell joint tight and the gap smooth?

2. Does the flip phone smell of rubber, plastic or chemicals after taking out the battery?

3. The charging interface of the second mobile phone has black scratches that are hard to eliminate. Most of the keyboards of refurbished machines are soft to the touch, not as tough as the keyboards of new machines?

4. Secondly, if the charging time is a little longer (generally more than 10 minutes), the phone will be turned off. This is a very effective way to judge the second mobile phone. ?

5. Because the SIM card chip contact and the battery contact JS cannot be replaced generally. Therefore, the second mobile phone will definitely have obvious friction marks and look shiny, which is caused by too much friction. ?

6. Second, the mobile phone mainly depends on whether there are obvious scratches on the screw and knife-edge interface and the two rubber pads under the inner screen. ?

7. Second, the quality of mobile phone calls is generally poor, there will be no noise and current sound, and the volume is small. ?

8. Because the spare parts of the second mobile phone are mostly early products with poor quality and low price. If you come across a ridiculously low-priced mobile phone, but the merchant calls it a parallel product, you can basically conclude that it is a second mobile phone.