1, look at the string number (IMEI). Mobile phone serial number, like ID card, the IMEI number of each mobile phone is unique, generally speaking, it can be used to determine whether a machine is genuine. 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 consistent. If the motherboard string number and the case string number are inconsistent, then the machine is likely to be repaired or assembled. If the three string numbers are consistent, coupled with an access license, you can basically prove that the machine is genuine.
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2, fingerprint: After getting the phone, the first thing to look at is the shell of the phone. Look at the screen, the camera and see if there's any fingerprints left. Check the data cable port, headphone jack, and strap hole for dust.
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3, records: phone book, call records, text messages or games, whether anyone has used it, leave a record. If anything, the possibility of refurbishing the machine is high. In standby, enter: *#92702689# to see if there is a call history. Check for records in wap and language functions.
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4, warranty: regular warranty card and invoice, which is certain, there are three guarantees policy protection. If not, it's a refurbished machine, or a very short warranty period.
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5, accessories: the general original genuine products are a charge. Refurbished machine, parts are not complete, or not original. So before buying, it is best to understand what the accessories of this phone are like. Check whether the accessories are marked by screws in the fuselage, and whether the upper and lower covers have a feeling of bump.