6 Essential Tips for Buying a Used Phone

Are you looking to save money by buying a used phone? GREEN Phone has the perfect guide to help you make the right choice - their 6-step guide can make selecting your old phone quick and easy.


Verify Tightness of Screws

When purchasing used machines, buyers should first consider whether the device is still in good condition. This determination plays a crucial role in the decision-making process.

When considering a purchase, sellers may claim that their item has never been disassembled. However, it is essential to conduct a thorough examination of all components to validate this assertion. One reliable method is to meticulously assess the sharpness of the screws.

Xem ốc vít
See screws

When inspecting phones that feature a removable back case, it is important to examine the screws on this side for sharpness and scratches. In case the device has been disassembled, it is highly likely that the screws will exhibit signs of wear, fraying, or possibly even obscured edges.

Additionally, it is important to check if there is any overlapping of stickers on the device’s body. Genuine distributors typically apply a small stamp on the screw or body, so be cautious of machines that have stamps on all the screws as this may be an attempt to deceive.

How to Verify an IMEI Number

Check IMEI Number Check IMEI Number

The International Mobile Equipment Identity (IMEI) is a crucial code that is assigned to every mobile device. This code provides essential information about the origin of your phone and enables verification of its authenticity.

To check the IMEI of your device, follow these steps:

1. Open the dialer application on your phone.
2. Enter the code *#06*.
3. A series of numbers will appear on the screen.
4. Use these numbers as reference to learn more about your device.
5. For detailed information, refer to the article provided.

Testing the Touch Screen: Step 3

Once you have confirmed the device’s origin and “zin” level, the next step is to inspect the screen.

To test the touch screen functionality, follow these simple steps:

1. Launch the calling application on your device.
2. Proceed to press each number displayed on the screen.
3. Observe if each press registers a corresponding action on the screen.

By performing the above steps, you can verify the responsiveness and accuracy of the touch screen.

To ensure the functionality of your device’s touch screen, we recommend performing the following steps:
1. Rotate your screen to landscape mode.
2. Open the message writing application.
3. Compose a new message, ensuring that you press all the characters on the virtual keyboard.
If you encounter no issues during these operations, you can be confident in the performance of your touch screen.

Mua điện thoại cũ

Check the screen

Assessing Listening Abilities: A 4-Step Process

One of the features available is the capability to make calls, giving users the opportunity to test the reception quality and internal speaker of the device by making a call using a SIM card from one of the three main carriers in Vietnam. Please allow a few minutes to set up and test this feature.

Test your ability to listen to calls

Make calls

Vibration Testing and Connection: An Overview

Our device offers various features to enhance your calling and messaging experience. In addition to checking vibration and speakerphone options, you can also troubleshoot common issues such as a ring tone without vibration, inability to send messages, or disabled vibration function.

Please kindly request the seller to enable the Wifi and Bluetooth functionalities for a duration of approximately 30 minutes to assess the stability and quality of these connections. Thank you.

Bật Wifi, Bluetooth
Turn on Wifi, Bluetooth

Testing Battery Capacity of 6 Cells

To ensure optimal performance, it is recommended to conduct a battery test lasting approximately 10 to 15 minutes to evaluate the charging speed and temperature. If any overheating or shorting occurs during the test, it is an indication that the device is no longer viable. Additionally, it is advisable to inspect the copper pins that come in contact with the battery. Authentic batteries typically exhibit a slightly dim, rather than shiny, copper coloration.

Charge the battery:

Battery Testing

These methods can also be applied to tablets. However, it is important to note that for iPads or tablets that do not support calling, step 4 does not need to be checked.

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