2. Look carefully at whether there are dial marks at the battery lock of the fuselage, whether there are rotation marks at the rotating shaft of the upper and lower covers, and whether there are indentations at the two protrusions of the upper cover.
3. Carefully check whether there are records in WAP, voice function and call record information function.
4, shell contrast (contrast proved to be a good machine, brightness, uniformity, color tone, granularity ...).
5, smell the smell, the new machine has sandalwood, different from ordinary detergent and perfume, the fuselage can not have sticky wax and oil (if there is, it is beautified).
6. Carefully check whether the contact point between the SIM card and the battery of the fuselage has wear marks (distinguish other contact points).
7. Check whether the joint gap of the shell is even, whether it is below 1MM, whether there are pry marks, and whether there are pry marks at the two sealing points under the screen in the upper cover.
8. Use the new machine to compare the elasticity of the buttons and the brightness of the internal and external display screens.
9. Look carefully at whether the fixed gong nail of the fuselage has rotary printing, painting and inking, and whether there are pry marks on the trademark.