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How to Test for Initial Defects After Buying a Galaxy Smartphone

Lavian Plastic Surgery Clinic · 그리운 어제, 행복한 오늘, 설레는 내일... · March 9, 2023

I’ll briefly explain how to test for initial defects after purchasing and unboxing a Galaxy smartphone. ​ The method is very simple. ​ In phone mode, enter the following on the key...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Lavian Plastic Surgery Clinic

Original post date: March 9, 2023

Translated at: April 24, 2026 at 12:41 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

I’ll briefly explain how to test for initial defects after purchasing and unboxing a Galaxy smartphone.

The method is very simple.

In phone mode, enter the following on the keypad:

#0#

Then you will immediately enter the test mode shown below. ​

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Enter #0# in phone mode

How to Test for Initial Defects After Buying a Galaxy Smartphone image 2

Screen in test mode

Now, on the screen above, just touch the part you want to test.

If you touch RED at the top left, you can perform a display test like the one below.

First, you should check whether there are any hot pixels or dead pixels.

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If you touch RECEIVER and VIBRATION, you can test the sound and vibration respectively.

If you touch SENSOR, the following screen appears.

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If you select TOUCH, you can test the performance of the touchscreen on the screen below.

How to Test for Initial Defects After Buying a Galaxy Smartphone image 5

In addition, by touching various items, you can run different tests.

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