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How to Check Used Samsung Smartphones Before Buying

ByJim Miller

If you're in the market for a used Samsung smartphone, it's important to check the phone's hardware before making a purchase. Fortunately, there's a simple way to do this without installing any third-party apps. By entering a secret code in the phone's dialer app, you can test the speaker, display, sensors, microphone, and more. Here's how:

Check Used Samsung Smartphones

  1. Open the Dialer (Phone) app on your Samsung phone.
  2. Type the code *#0*# (there's no need to tap on the Call button).
  3. You will see a secret diagnostic menu with many options to test the phone's display, speaker, camera, microphone, and all sensors.
  4. Follow the on-screen instructions one by one.

samsung phone secret code

FAQs

1. Will it work on all Samsung smartphones?

Mostly yes, we have tested this on Samsung S22, Samsung A72, and Samsung M series. So, it's fair to assume it'll work on other Samsung smartphones too. However, if you enter the code and nothing happens, chances are this feature is disabled on your device by your network provider.

2. What if I don't have a Samsung phone?

This functionality is baked into most Android phones by OEM. The activation code may be different depending on the phone's brand. For example, you can find this option on Xiaomi phones under Settings, search for the Kernel version, and tap on it 3 times. On Realme phones, this option is available under the diagnostics option under phone manager. For any other smartphones, you can use apps such as Phone Doctor Plus.

Buying or Selling your Old Samsung Smartphone

Overall, this diagnostic menu comes in handy when you buy a second-hand or refurbished phone and you don't have access to the internet to download an app. It's also useful when you want to sell your old Samsung phone and want to make sure the device doesn't have any major problems.

Also Read: 8 Quick Ways to Silence Samsung Galaxy Phone