Introduction

Smartphones and laptops are a very important part of our life today. We use them for connecting with friends, online studies, and running local businesses. Since new mobile phones are becoming very costly in Pakistan, many people prefer to buy second hand devices. Online classified websites like Apna Kunjah are the best places for our local audience to find amazing deals on used mobile phones near Gujrat, Kunjah, and Mangowal.

But, when you buy a used smartphone, the screen is the most critical and expensive component to check [1]. A phone might look perfectly clean from the outside, but its screen could be fake, locally repaired, or have hidden technical issues [1]. If you do not test the display properly during the face-to-face meeting, you can waste your money on a damaged device. In this detailed guide on Apna Kunjah, we will share simple ways to test a used mobile screen like a professional technician.

1. Check the Screen Brightness in Natural Light

When you meet the seller from Apna Kunjah in a safe public place, the first thing you should do is check the screen brightness. Turn the brightness level to the maximum 100% and then lower it down to 0%.

The screen should change brightness smoothly without any flickering (shaking) or blinking. If the screen flickers or colors look very weak, it means the display panel inside is old or damaged. Also, make sure the screen is clearly readable under bright natural daylight. Original mobile screens always have excellent visibility under the sun.

2. Search for Secret Dead Pixels

A dead pixel is a tiny broken dot on the mobile screen that never changes color. Sometimes, it is very hard to see these tiny dots on a colorful background wallpaper. To find them, download a pure white image and a pure black image on the phone.

Open the pure white picture in full screen mode and look closely at every corner. If you see any permanent black, red, or blue dots, those are dead pixels. Similarly, check the pure black image to see if there are any unusual bright white spots. If a screen has multiple dead pixels, do not buy that phone because the damage will increase over time.

3. Perform a Complete Touch Panel Test

Sometimes, a specific corner or a small line on the phone’s screen stops responding to your finger touch. To test the full touch functionality, tap and hold any app icon on the home screen until it starts to shake.

Now, slowly drag that app icon across every single area, corner, and line of the screen. If the app icon drops automatically at a specific spot, it means that part of the screen has a dead touch zone. On Apna Kunjah, we always advise our local community to do this simple drag test because it catches hidden touch faults in less than a minute.

4. Identify a Fake or Replaced Screen

Original mobile screens are very expensive, so many sellers replace broken screens with cheap, low-quality local copies before selling the phone online. You can easily catch a fake screen by looking at the borders (Bezels).

Look at the edges where the screen glass meets the metal body of the phone. If you see any dried glue coming out, or if the screen is slightly popping up, it means the phone was opened and locally repaired. Cheap copy screens also have thicker black borders and poor touch responsiveness compared to original factory displays.

5. Check for Hidden Screen Burn-in

Screen burn-in is a permanent discoloration or ghost image that gets stuck on the display panel forever. It usually happens on old AMOLED screens when the same image is displayed for a very long time.

To check for burn-in, open a completely gray or light blue background image. Look closely at the top notification bar area and the bottom keyboard area. If you can see faint, permanent shadows of letters, battery icons, or keyboard buttons behind the background, the phone has a screen burn-in issue. This issue cannot be repaired without changing the whole screen.

6. Test the Automatic Screen Rotation and Proximity Sensor

A mobile screen has smart sensors connected to it that improve your user experience. Open the mobile YouTube app or gallery, turn on “Auto-Rotate,” and tilt the phone sideways. The screen should rotate immediately without any lag.

Next, make a quick test phone call and put your hand over the top speaker area of the screen. The screen should turn completely black instantly. This is called the proximity sensor test. If the screen stays on during a call, your face will accidentally touch and cut the call, which is very annoying for daily usage.

Conclusion

Testing a used mobile screen thoroughly requires only five minutes of patience, but it can protect our local audience from massive financial losses. By checking the brightness levels, searching for dead pixels, doing the app drag test, and inspecting the outer glue marks, you can easily buy a premium smartphone with total confidence. Apna Kunjah will always continue to provide a clean and transparent digital directory to help our local neighbors make safe and smart tech purchases. Stay alert, test carefully, and enjoy trading on Apna Kunjah!