First, the new machine identification
Note: The following methods are for reference only. Actually, please refer to the inspection report of the local quality inspection department at or above the provincial level.
1. Look at the serial number (IMEI) of a mobile phone. Just like an ID card, the IMEI number of each mobile phone is unique. Generally speaking, it can be used to judge whether a machine is genuine or not. The discrimination method is as follows:
Enter * # 06 # in the standby state of the mobile phone, 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 chassis. The other label is generally 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 and the serial number of the chassis are different, then the machine is probably repaired or assembled. If all three serial numbers are the same and there is a network access license, it can basically prove that this machine is genuine.
However, it is not 100% sure that the serial number of the motherboard can be written by computer and software, and the fake serial number label can be bought for a few dollars. For the sake of caution, we should continue to verify according to the following methods.
Note: The seventh and eighth codes of mobile phone serial number used to indicate the origin of mobile phones, but this method is no longer used to distinguish the origin of newly produced major brands of mobile phones. By analyzing the origin of mobile phone serial number to explain the quality of mobile phone, there is no theoretical basis at present, so please don't blindly follow.
2, look at the machine packaging and instructions.
The packaging and instructions of the regular new machine are beautifully printed. Nokia's high-end models are mostly printed on coated paper, and the fonts and images are clear and layered. However, counterfeit packaging boxes are mostly copied on simple single-sided paper, with rough fonts and images and blurred printing handwriting. Many instructions modified by informal channels are even plagiarized.
3. Look at the network access license
There is a watermark on the real network access license, and the color changes regularly; Most of the fakes are imitations, and the surface color has not changed.
If you can't see it, you can also use ultraviolet light (money detector) to illuminate the network access license, and the real label will display the red "CMII" anti-counterfeiting logo. While the dummy pattern is blurred or not displayed.
The words on the real network access license are printed with a needle printer, and the numbers are clear. If you look closely, it is the dent made by the needle, while the fake network access license is printed by a printing machine, and the numbers are blurred and there is no dent.
Generally speaking, it is difficult to fake the network access license, after all, the cost of counterfeiting is high. In addition, you can also check the authenticity of the network access license through online inquiry.
Step 4 look at the phone case
When you open the new machine, you will obviously notice that the "key parts" of the machine are covered with film for key protection, such as the inner screen, the outer screen and the camera. As long as the used mobile phone leaves traces. In addition, dust and traces of use are inevitable when renovating the machine.
The gap between the upper and lower casings of the machine, the gap around the keyboard and the charger slot are all places that are easy to "hide dirt and shelter evil people", and the rotating shaft of the clamshell machine will also leave traces of use, so special attention should be paid.
5. Look at the screws and seams
You can check whether the seams of the mobile phone are even. Generally, the shell quality of refurbished machines is poor, and the gap will be narrower and wider.
In addition, check whether the screws of the fuselage are brand new and whether there are any traces of screwdriver screwing.
6. Look at mobile phone accessories
The new machine of the regular manufacturer has a full set of original accessories, which should be charged at least once. 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, if scratches are found on the plug of the matching charger and earphone, then the mobile phone is likely to be tampered with.
7. Look at the usage record and running status of the mobile phone.
Look at the records of games, short messages, phone books, call records, homemade ringtones and other items in the mobile phone. If there are, most of them are not brand-new mobile phones.
In addition, during normal use, the machine frequently shuts down or crashes automatically. It can be said for sure that there is something wrong with the motherboard or software of this mobile phone.
8. Read the warranty.
Regular dealers will take the initiative to issue invoices and enjoy the service of three guarantees nationwide. Refurbished mobile phones cannot enjoy all the rights and interests stipulated in the "three guarantees" of regular mobile phones, so there is generally no warranty period or a 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.
9. Look at the price
As the saying goes, greed is cheap, and big losses.
Before buying a machine, you'd better find out the price of a mobile phone online. If the price of JS newspaper 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".
Have a complete and effective invoice and warranty card, so that the legitimate rights and interests can be guaranteed when there is a problem with the machine.
10, odor
Most new machines have a special sandalwood smell when electronic products leave the factory, which is by no means imitated by ordinary perfume. Old machines and shell changers generally do not have this smell, or the smell left during processing.
Extended data
Daily maintenance of mobile phones
1. Don't wait until the battery is dead before charging?
Generally, we have an idea that it is best to charge the battery of a mobile phone after it is fully discharged. Basically, this is the case, because most of the rechargeable batteries we used in the past are nickel cadmium (Nicd) batteries, which have the so-called memory effect. If they are not fully discharged and recharged, the battery life will be rapidly reduced.
That's why we started charging with the last drop of electricity. Nowadays, mobile phones and general digital products mostly use lithium (Li) batteries, and there is no memory effect problem in lithium batteries.
If we still wait until all the batteries are used up before recharging, the chemical structure inside the lithium battery will be unstable, resulting in a shortened life. This is the manufacturer's information, and I have tested it myself.
2. Don't answer the phone when the phone is charging! !
The reason is that it is potentially dangerous to answer the phone when the phone is charging.
There is a 3 1 year-old young man in India who works as a business manager in an insurance company. 10 days ago, he answered the phone when the phone was still connected to the charger. After a few seconds, a lot of current passed through the mobile phone, and the young man was thrown to the ground. When the family found out, their fingers were burned, their heartbeat was weak and they were unconscious.
After being rushed to the hospital, the doctor pronounced him dead. Mobile phone is the most commonly used modern invention. However, we should also be alert to the danger of instrument death.
Baidu encyclopedia: mobile phone