When buying a used mobile phone, it is very important to check not only its appearance, but also its performance. There are a few things to look out for first. In order not to experience disappointment some time after buying the phone, you should carefully check its condition.
Instructions
Step 1
First of all, pay attention to the appearance of the device - a heavily frayed case and a scratched screen indicate that the owner of this phone was not very frugal, which means that the phone could fall repeatedly, which in no way can have a positive effect on the state of its contacts and microcircuits. No matter how attractive the price of such a device is, it is better to refuse to buy it. The sellers of such phones usually convince gullible buyers that changing the old case to a new one is easy and inexpensive. However, they are silent about the fact that not every case must be replaced, and if it is, the cost of replacing it with a high-quality original sample may be equal to the cost of the used device itself.
Step 2
After you have managed to find a cell phone with the appearance of a solid four, you should examine the battery. Open the back cover of your phone and inspect the battery. If the battery shows signs of deformation, it means that it has been overheated or has been in water for some time. Such a battery will not last long, and you will have to fork out for a new one. The battery contacts must be free of oxidation and clean. Also carefully examine the appearance of the screws that secure the case - they should not have any scratches or screwdriver marks. Otherwise, we can say that the phone was sorted out, and it is not known what was done with it.
Step 3
If the appearance of the battery and fastening screws as well as the appearance of the case itself is quite normal, turn on the phone - it's time to check its performance. First, make a call and check if the other person hears you, and also how well you hear him. Ask to call you, and make sure that the beep and vibrating alert are working.
Step 4
Almost every modern phone has a camera - check it in operation, and at the same time the display for dead pixels. To do this, take a photo of a white sheet and make sure that the camera is working properly, and that no black or luminous dots appear on the display.
Step 5
Check the functionality of all the phone keys - they should not "stick" or require repeated pressing. If your phone has a touchscreen instead of a keypad, also check if the screen responds to touch in all parts. If your phone has Bluetooth or Wi-Fi modules, be sure to turn them on and try to find wireless devices near you.
Step 6
If in the process of all these actions you were able to independently verify that the phone is fully functional, you can safely purchase such a device.
