Digital Transformation

5 Useful Tips When Buying a Used Cell Phone

Phan Van Hoa DNUM_AFZAFZCACF 14:10

Are you considering buying a used mobile phone to save money? Don't miss these 5 useful tips to choose a quality phone, avoid risks and optimize your experience.

There is no denying that smartphones are not cheap for many people’s income. Although many people turn to choosing low-cost models on the market, these “popular” options sometimes exceed the budget of many consumers.

However, there is still another way to help users save money while still owning a phone they like, which is to buy a used phone.

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Illustration photo.

Of course, when it comes to used phones, many people still feel apprehensive. Buying a device that has been used by someone else often comes with concerns: "Is it defective? Is it durable? Why did the previous owner abandon it?", completely legitimate questions.

But in reality it is not like that, if you know where to buy and know how to check, you can absolutely buy a quality phone at a reasonable price.

1. Carefully research the reputation of the seller

The first important step in buying a used phone isn’t choosing a model or configuration, but rather researching where you’re buying from. In the world of used tech, the reputation of the seller is your first line of defense.

Make sure the seller has been around for a while. Check their reviews on trusted platforms to ensure they have a good track record of customer service. Also, don’t hesitate to ask about warranty policies, most reputable stores will offer at least a 12-month warranty.

There are many e-commerce platforms and mobile device resale stores, but not all of them are trustworthy. Always check the seller's ratings and read previous customer reviews before buying.

Pay attention to the device quality grading system the seller uses, such as letter grades (A, B, C) or condition descriptions. This will help you know exactly what condition you're getting.

2. Check IMEI: A step you cannot skip before deciding to buy

Once you have chosen a satisfactory phone from a reputable seller, the next step is not to pay immediately, but to check the device's IMEI, a small but extremely important step to avoid buying a stolen or network-locked phone.

IMEI (International Mobile Equipment Identity) is a unique identifier for each phone, and you can easily check it by dialing *#06# on your device's keypad. Reputable resellers will usually be able to help you check if the IMEI is listed as stolen, locked, or has any carrier restrictions.

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Check the phone's IMEI, a small but extremely important step to avoid buying a stolen or network-locked phone. Photo: Internet

Whether you’re buying online or in person, the first two pieces of information you should ask for are the IMEI and serial number. If the seller can’t provide them, it’s a clear red flag that you’re dealing with a stolen or counterfeit phone.

Especially for iPhone devices, before purchasing, make sure the iPhone has been removed from iCloud account and out of Activation Lock mode. Otherwise, you will not be able to use the device no matter how good the hardware is.

If you buy in person, ask the seller to try the SIM card and demonstrate that the phone can receive a network signal. This is a quick way to confirm that the device is not network locked or disabled.

However, this is difficult to do when buying online, so prioritize stores or platforms with transparent return policies, so you can return the device if problems arise.

3. Test all basic functions of the device before paying

Once you have the phone you want, don’t rush to set everything up and start using it. First, take a few minutes to check that all the basic functions of the device are working properly, like a “general health check” before signing a contract.

Some quick tests you can easily perform right after turning on your machine:

- Make a test call to ensure the connection is stable.

- Send SMS message and check if it is sent successfully.

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Take a few minutes to check that all the basic functions of the device are working smoothly before deciding to pay. Photo: Internet

- Play test music or video to test speakers and sound quality.

- Open your browser and visit a website to make sure your mobile data connection is working.

- Take a few photos, check the sharpness and focus of the camera.

- Connect to Wi-Fi and test the hotspot to check wireless network connectivity.

Additionally, users should also ask the seller to run a hardware/software diagnostic and send you the results. This report will help you detect potential battery, camera, GPS, or touchscreen issues early.

Most professional vendors have dedicated testing tools, but if not, you can use free diagnostic apps on the app store to test your device yourself.

4. Check the appearance and screen

Once you have determined that the phone is still working, the next step is to check the exterior, especially the body and screen. With used phones, it is normal for a few scratches to appear.

However, you should still look closely for small cracks or signs of damage, as these can become more serious over time. A simple trick is to run your fingernail around the edge of the screen, if it gets stuck somewhere, there may be a small crack that is hard to see with the naked eye.

In particular, users should carefully check areas such as the screen, charging port, headphone jack, and camera cluster for obvious signs of damage. Look for details such as loose screens, misaligned screws, or any abnormalities that may indicate the device has been repaired.

A useful test is to increase the screen brightness to maximum to easily spot scratches or irregularities.

If you are buying online, ask the seller to provide clear, high-quality images so you can zoom in and examine the device carefully before making a decision. When you receive the device, take the time to check for common screen defects such as dead pixels or uneven color display areas, which are signs that the screen may be damaged.

5. Don't forget to check the connection port and battery quality

Before deciding to buy, take the time to check the connection ports and battery status, two important factors that directly affect the user experience. First, you have the right to ask the seller to show you the device being charged to ensure that the charging port is still working properly.

When charging, pay attention to see if any liquid warning messages appear on the screen, as this could be a sign that the device has been exposed to water.

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Before deciding to buy, take the time to check the device's connection ports and battery status. Photo: Internet

Another thing to check is whether the battery is bulging. A simple way to do this is to lay the device on a flat surface and look from the side to see if the back is lifting up abnormally. Also, take a close look at the charging port to make sure there are no broken contacts or dirt buildup.

Additionally, buyers should check for signs of corrosion around the headphone or charging ports, as this could be the result of water exposure. Even if the initial damage is minor, water can silently affect the circuit board and cause the phone to fail completely over time.

In particular, buyers should bring their charger and headphones to try directly. Check the charging and sound capabilities. If you buy online, ask for videos or pictures to prove that these features still work.

Also, check the battery status in the device settings, if the index is at 90 - 100%, the battery is still good; 80 - 90% is acceptable, and below 80% you should consider replacing the battery.

In short, buying a used phone can be stressful, especially if you don’t know where to start. But with a few key points in mind, you can avoid common pitfalls and make the buying process a lot simpler and safer.

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5 Useful Tips When Buying a Used Cell Phone
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