Things to Note Before Buying an Old Samsung Phone

This guide covers things to note before buying an old Samsung phone with practical context and easy-to-follow details. Use it to understand the subject and apply the information confidently.

Samsung machine test operations before purchasing include:

1. Check Out the Appearance

Start by anyone who buys an old phone will observe the sensory aspect of the first product. Look carefully at the camera body, the edge of the machine is scratched or scratched, is there any serious scratch? The appearance of the machine determines a lot of aesthetics, because no one will spend money to buy an old and ugly phone. Please check carefully because it is not necessarily the perfect beauty machine is good, because the seller can proceed to replace the outside case. So if you buy a used phone for a few years but feel like a new device, don't rush to whisper, remember to test more carefully at other steps to make sure you can buy good stuff. Look, if the device is satisfactory, will we check that the details inside the camera are working properly?

2. Connection Port

Charging port

This is a very important part of the device, if the machine cannot charge, you will not be able to use it and will spend money to fix it. When testing the device, you should ask the user for charging to see if the battery is in or not. In addition to plugging in the power supply, you should also check the port connected to the computer to see if the machine is accepting or not? Please observe carefully the charging feet, because used machines often break or dust clinging is not guaranteed.

Headphone port

You should also plug the headset into the device to see if the headset is working properly, the sound will be shy or there is a problem.

3. Use the Machine Test Command to Test the Hardware

With Samsung lines, you can use * # 0 * # Command to check the hardware of the device. After entering the test interface interface command, select each item to check the product.

Screen test: Select Red, Green, Blue, Dimming.
Tap test: tap.
Speaker test: Receiver (Voice Speaker), Speaker (Speakerphone).
Vibration test: Vibration.
Check camera: Front cam, Mega cam.
Check the function keys: Sub key.
Along with many other feature testing items. These are the main test items that you can refer to.

In addition, you can use some of the following code to check more information for the device:

Software version check code: * # 9999 #.
Code to try vibration mode: * # 9998 * 842 #.
Code to check battery performance parameters: * # 9998 * 228 #.
Code for menu navigation to English: * # 0001 # and press SEND.

4. You Check the Connections and Sensors

Wi-Fi connection

For the device to connect to Wi-Fi to see if the device has any errors, please open the app, browser in the phone to see if the device is connected to Wi-Fi or not?

Bluetooth connection

Sending files via Bluetooth to another device as well as receiving from another computer is fine if no other person can find you when connecting to Bluetooth.

Sensor automatically rotates the screen

While watching movies, turn on the auto-rotate mode on the computer to see if this feature is still sensitive.

Proximity sensor

You manipulate the phone call and cover the sensor if you turn off the screen, the proximity sensor works well.

GPS location positioning operation

You open the Google Map app to see if the device has a relatively accurate positioning at where you are opening the device. If relative location is received correctly, you can safely use the location feature on the device.

So the machine can partly reflect the quality of hardware and software in operation on the machine.

Take photos, record videos

For many people who are very interested in this feature, so open up the camera and check if the image quality is good and sharp?

When buying a second-hand machine, you need to ask the seller to log out of all available accounts on your device, such as a Samsung account and a Google account. Because if you do not log out, your phone is very vulnerable to lockdown. So, log out of the old owner's account and restore the original settings to the device to ensure safe use.

6. Check Machine IMEI

Each of us will own a different DNA pattern, and so will smartphones. It is possible to view the mobile IMEI numbers as well as a piece of DNA code. There will never be two phones with identical IMEI numbers, unless one of the phones has a problem. Therefore, when buying an old phone, you should conduct a thorough check on the IMEI number.

To check your phone's IMEI number, enter * # 06 #. At this time an opened window displays information about the IMEI number of the device.

Next, please compare this IMEI number with its own IMEI number on the Settings section of the phone to see if it matches. Some models have an IMEI number on the back (eg iPhone) or a sticker printed with an IMEI below the device's battery. Please compare both IMEI numbers in these locations.

If all IMEI numbers match, your phone has already passed the 'parking lot' already. If there is any difference, it is an abnormal expression. It is very likely that the phone you are testing is swapped main or replaced with an IMEI number.