Inspection plan for refurbished machines: 1. Check carefully whether there are any marks on the screen, and whether there is dust on the data cable, headphone hole, speaker hole, and strap hole. 2. Check carefully to see if there are any scratches on the battery lock of the fuselage, if there are any rotation marks on the rotating shafts of the upper and lower covers, and if there are any indentations on the two bumps on the upper cover. 3. Carefully check whether there are records in the WAP and voice functions and the call record information function. 4. The shell depends on comparison (compare brightness, uniformity, hue, granularity,,, with proven machines that are good). 5. Smell the smell. The new machine smells of sandalwood, which is different from ordinary detergents and perfumes. There should be no sticky wax or oil on the body (if any, it has been beautified by JS). 6. Carefully check the SIM card contact points and the body battery contact points for wear marks (distinguish the rest of the contact points). 7. Check whether the gaps at the seams of the shell are even and below 1MM, whether there are pry marks, and whether there are pick marks at the two sealing points under the screen inside the upper cover. 8. Compare the flexibility of the buttons and the brightness of the internal and external displays with the new machine. 9. Check carefully whether there are any rotation marks on the fixing nails of the fuselage, paint or ink (you can use a magnifying glass), and whether there are pry marks on the trademark. Customer service 33 will answer your questions. Broadband on demand is as fast as you want. China Telecom Guizhou customer service public account replies with the keyword "broadband on demand" and you can apply for it directly, which is convenient and fast.