二手手机的选购有“三步曲”,即一看外表,二查性能,三验配件。一看外表即看外壳和显示屏有没有划痕,数字按键是否模糊不清,按键是否灵活。最后,检查手机背面标贴上的机器型号和IMEI码是否齐全,并记下这两个号码。二看性能这是判断手机好坏的关键,先不要插入SIM卡,用手机拨打112电话,如果听到诸如“请在电话号码前加拨区号”等提示音,语音清晰明了可初步判断手机的收 Second-hand mobile phone purchase has a “trilogy”, that is, look at the appearance of the second search performance, three test accessories. A look to see the appearance of the shell and the screen there is no scratches, the number of keys is unclear, the keys are flexible. Finally, check the phone label on the back of the machine model and IMEI code is complete, and note the two numbers. Second look at performance This is the key to judge the phone is good or bad, first do not insert the SIM card, call 112 phone with the phone, if you hear such as “Please dial the area code in front of the phone number” and other beeps, voice clarity can be a preliminary judge phone Close