To buy this question about the inspection of the machine 20

The method of machine inspection is as follows:

1. First of all, look at the appearance of the phone

Whether the mobile phone screen is damaged or deeply scratched, whether the corners of the screen are cracked, whether there are bright spots, white spots, stripes on the screen display, and whether there are flashing white stripes on the screen.

2. Screen touch:

Press and hold the icon to enter the mode, drag the ** mark back and forth (mainly for the edge area), and try a few times to see if there is any ineffective touch.

3. Mobile phone button detection:

Check whether the volume button, vibration switch, power on/off button, and home button of the mobile phone are working properly (press each button several times); Connect the mobile phone charger to observe whether the mobile phone is charging normally (plug and unplug it back and forth 3-5 times).

4. Check the performance and software functions of the mobile phone

1) After opening the Wi-Fi connection, walk around for 3-5 meters to see if the Wi-Fi is normal.

3) Insert the mobile phone card to observe whether the signal is normal (Bank of China tries to use the telecom card).

4) Turn on the dialer and dial **Test the handset, light sensitive, speaker, and microphone to see if they are normal.

All mobile phones are recorded in the unboxed and recorded**, and the evidence is kept to avoid later disputes. Check whether the appearance of the phone is consistent with the seller's description, and check whether the accessories are original and can be used normally. If the appearance and condition are too different or the accessories promise to be original but not original, you can return them or negotiate with the seller to deal with them.

After the appearance of the mobile phone is checked, the call situation should be checked, and the mobile phone dials ** to check whether the sound of the earpiece is normal, whether there is any blockage, resulting in too small sound and inaudible. Turn on the speaker to check if the other person's voice is clear and whether the other person can hear you clearly.

After the mobile phone is connected to the data, the signal is normal. After turning on the data, can you go online normally, browse the web, try the network speed, and then connect to wifi to see if the signal has network speed, you can refer to other mobile phones.

Use the front and rear cameras to take photos and check whether the focus is normal and whether the photo is very clear. You can also press and hold to take a photo to take a continuous shot to see if there is any stuck, and multiple cameras will detect whether it is broken one by one.

The most intuitive embodiment of these two things is whether the screen will naturally turn off when answering**, and whether the brightness of the screen will become brighter and darker with the environment outdoors. Dial the ** hand in the distance sensor to fill the position and shake, check whether the screen is off, you can see whether the distance detection is normal. The light sensor can turn on the automatic brightness adjustment to check whether the screen brightness changes normally in bright light and dark places.

Turn on and off the flash to see if the brightness is normal, only check whether the call speaker is normal in front, and now you can put on a song to see if there is a big noise or a small sound.

The most direct use of this project is that when the phone is flipped, the pages of some apps on the phone will also be flipped. Here you can open a section of **full screen**, flip the phone to see if the screen follows the flip. The gyroscope in the gunfight game relies on this function, such as the Peace Elite, and you have to pay attention to the little friends who like to play games.

There's more to say here, drag the icon on the screen to pull to see if there is any broken touch, and check for stains, highlights and crushes under the solid wallpaper. Check whether the screen is aging, leaking, and burning, and then roughly check whether the original screen can be disassembled. These functions can be detected at one time in some third-party software, such as Antutu and so on.

Check whether there are traces of human disassembly from the tail plug screw, and the screws can be seen at a glance after dismantling and repairing.

Note: From the selection of the model to the purchase channel, and finally to the transaction inspection, the whole process is not so simple, and there are many points to pay attention to in each step, and you may be deceived if you are not careful. Of course, in addition to mastering this knowledge, the most important thing is to be careful and patient, after all, no matter how subtle ** will be exposed, as long as you observe carefully, you will not be deceived.

In addition, it should be noted that do not be greedy for small gains, because greed is the driving force behind being deceived.

If your phone hasn't been activated yet, you can check your phone by doing the following:

1.Visual inspection: Carefully inspect the appearance of the phone, including the screen, body, buttons, interfaces, and other parts. Look for visible breakages, scratches, or other irregularities.

2.Observe the screen: Turn on your phone and observe the screen. Check if the screen is displayed normally, and if there are any problems such as bright spots, black spots, dead pixels, or color distortion.

3.Physical Button and Interface Test: Press the physical buttons on your phone, such as the volume button, power button, etc., to check if they are sensitive and working properly. At the same time, connect various interfaces (such as charging ports, earphone jacks, etc.) to verify whether they can be connected normally.

4.Hardware testing: Run some basic hardware testing applications on your phone, such as checking whether the camera, speakers, microphone, fingerprint recognition, and other functions are working properly.

Card and network test: If a SIM card is available, plug it into your phone and verify that your phone captures the signal and connects to the network properly. You can try dialing**, sending a text message, or using mobile data to test your phone's communication capabilities.

6.Software & System Check: Check the software and system information by visiting your phone's settings menu to see if they match the configuration and version you learned when you purchased Chundou.

7.Review proof of purchase and warranty terms: Carefully read the invoice, warranty terms, or other relevant documents you received when you purchased your phone to make sure that the model, specifications, and other information on your phone are the same as what you purchased.

If you buy a second-hand phone, you can also consider verifying the authenticity and other details of your phone through the IMEI number. You can use the IMEI verification tool or contact the phone manufacturer to provide the IMEI number for more information.

Whether it is a new or used phone, if you have any concerns or find problems with the inspection results of your phone, it is recommended to contact the seller or mobile phone manufacturer in time for further guidance and solutions. <>

1. Check the outer packaging box of this book, the seal must be intact, especially the bottom of the box, now many profiteers are starting from the bottom of the box;

2. Check the serial number and check the appearance of the book after unpacking, if there are finger prints, whether there are plugging traces of various interfaces, whether there is dust at the heat dissipation port, whether there is dust on the rubber feet of the notebook, whether the seals of various accessories are intact, etc., etc., the more detailed the inspection, the better;

3、Plug in the external power supply to turn on,If this book has a pre-installed system,The registration interface of windows will appear when you turn on the computer for the first time,If it is directly into the system,This book must have been opened;

4. Use all kinds of software to detect the detailed configuration of this book

One. For CPU detection, it is recommended to use the software CPU-Z, II. For graphics card detection, it is recommended to use software GPU-Z, three. The most important point is hard disk detection, because from the hard disk detection, you can check the hard disk power-on time of the book, so that you can see whether the book has been turned on.

It is recommended to use the software ha hddlife when the machine is powered on and powered on (the hard disk will be powered on when it leaves the factory for testing, but the time should not exceed 20 hours).

Four. Memory detection,It is recommended to use the software ha memtest,5、Use screen detection software to detect whether the screen has bright spots or dark spots,It is recommended to use software:displayx,This is also very important,Because if there is a bad pixel on the screen of this book, it will definitely look quite unpleasant;

6. Use the comprehensive software everesta to view the details of the system;

7. After the configuration is correct, you can exit the external power supply and install the battery after booting for battery detection, it is recommended to use the software batterymon Chinese version;

8. Bring a few discs to try the optical drive, and by the way, you can also listen to the audio;

9. After confirming that it is correct, issue a ticket, pay, take the book, and leave

There are several major issues that need to be paid attention to when buying a machine:

1. First of all, see whether the mobile phone is a new phone, whether there is dust inside, whether there is a sandalwood fragrance, you can smell it, the new mobile phone has that smell;

2. See if the mobile phone is a licensed cargo machine, open the back of the case to see the license of the compass network, and immediately go online to check whether it is qualified;

3. Turn on the computer to see if there are any flowers on the screen;

4. Whether the horn is broken or not, whether there is noise;

5. There is no malfunction of the health plate;

6. Call a ** on the spot to see how the call quality is, and try to see if the headset can be used.

7. Take out all the mobile phone accessories to see if they are all complete, whether they are brand new or not.

8. If you can take pictures, of course, you have to see how the photo effect is;

9. Bluetooth, then laughing reed infrared can be used to see if it can be used.

10. Enter * to see if the serial number of the mobile phone is the same as that of the back of the fuselage and the mobile phone box.

11. Whether to issue a formal warranty invoice.

If there are no problems with the above points, you should be able to rest assured. Because after all, your question is a bit wide, and you didn't say the brand of the mobile phone, nor did you say the model, so you can't be funny, I hope these grandchildren will be useful to you.

Now the most afraid is to spend money but can't buy back the new machine and finish playing.,It should be OK to see the above points clearly.。