First of all, after you get the mobile phone, open the battery cover immediately to see if the screws are tightened and the warranty card is complete. And see if the accessories are complete (a battery, a charger, an earphone, a data cable, a memory card, an optical drive, instructions, etc.). If you buy parallel imports, this can be ignored. ) Then turn on the battery and turn it on. If the battery is dead or full, it proves that the phone has been touched by others and should be kept at about half of the normal power. Next, try some basic functions such as taking photos, making phone calls and sending text messages. Press *#06# to view the IMEI number. Licensed products must correspond to battery boxes and packaging boxes. Parallel imports must correspond to the battery compartment, and it doesn't matter if the boxes don't correspond, because they are smuggled. Generally, the factory film of mobile phones is not very good. It's better to tear it off after buying it, and go to a regular mobile phone shop to spend more money to stick a high-grade film (my mobile phone just tore the original film and spent 38 yuan to stick a high-grade film), which is really much more wear-resistant than ordinary films.

As for the software, install the mobile phone 360 first, kill the mobile phone once, and then install QQ20 10 if there is no problem. I recommend several softwares, such as reading stars (you can read e-books, you can be a file manager), signing mobile phones (SIXX is the signature for SIS) and so on.

Usually, be careful not to collide with batteries frequently, otherwise it may cause explosion. It is best to use the original charger and original battery (you can also buy brand batteries, Scud and Hongyi are both big manufacturers), and don't buy assembled batteries cheaply. And don't use universal charging, because universal charging is constant voltage power supply, and the voltage of each battery is different, which is easy to bulge. Mobile phones should not always be placed in damp, cold or hot places, but on a dry and ventilated table.

Once the water enters, never press the power off button to turn it off, which may cause internal short circuit and burn out internal components. Pull out the battery immediately, first blow dry the water on the surface with a hair dryer, then disassemble the mobile phone, clean it with anhydrous alcohol (alcohol will not harm the circuit board), and then dry it in a ventilated place for about 2 days, and it can be used normally.