Observe the screen and holes carefully.
Look carefully at the screen for traces, data lines, earphone holes, speaker holes and tape hanging holes for dust.
Observe the fuselage carefully
Carefully check whether the battery lock of the fuselage has any poke marks, whether the rotating shafts of the upper and lower covers have any rotation marks, and whether the two bumps on the upper cover have any indentation.
Check functions and call records
Check carefully whether there are records in WAP, voice function and call recording information function.
Contrast shell
Shell contrast (machines with good contrast, such as brightness, uniformity, color tone, granularity, etc.).
smell
Smell the smell. The new machine smells of sandalwood, which is different from ordinary detergent and perfume. There must be no sticky wax and oil on the fuselage (if there is, it has been beautified by JS).
Check the contact point
Carefully check whether the contact point between the SIM card and the battery of the fuselage has wear marks (distinguish the other contact points).
Observation joint
Check whether the gap at the joint of the shell is even and below 1MM, whether there are prying marks, and whether there are prying marks at the two sealing points under the screen in the upper cover.
Contrast keys and screen brightness
Compare the elasticity of keys and the brightness of internal and external display screens with the new machine.
Observe the fixed gong nails and trademarks.
Look carefully at the fixed gong nail of the fuselage for rotary printing, painting and inking (you can use a magnifying glass) and prying marks on the trademark.