How to Quickly and Accurately Check an Old iPhone Before

This practical guide walks through how to quickly and accurately check an old iPhone before, explains the main requirements, and highlights common issues that may appear along the way.

Checking old iPhone before buying helps you avoid the risk of machine failure, construction goods, parts replaced, . so you can feel more secure when buying an old iPhone but still achieve the best quality. .

1. Check out appearance

Check out the appearance of the front, back, and bezel. Appearance is the first thing that concerns old iPhone buyers.

You need to carefully check the look of the machine, pay attention to the 4 corners of the phone border to see if it is distorted, scratched, the back is concave due to the impact.

Check iPhone screen

To test the iPhone screen, try setting the wallpaper of the iPhone to black to see if the screen is exposed or not.

Then you move into the white background to check for smudges or may occur phenomenon  " negative image ".

Image image is the condition in which the screen will save the images you are manipulating, especially when using the camera for a long time and it gets hot.

To check if the iPhone screen has been replaced, take 1 piece of white sticky tape on the screen. If you lift up the tape and do not eat much, it is a standard screen, but if it is difficult to remove the tape from the screen, the screen is most likely replaced .

3. Test iPhone touch screen

You can check the iPhone's touch screen by tapping an icon and moving it full screen, if in a certain position the icon stops, there may be a problem there. .

4. Check the Home key and volume

The hard keys such as  the Home key , the volume are used quite a lot and throughout the process of experiencing the machine. Therefore, you should carefully check the hard keys before buying, do not choose to buy products with hard keys that are difficult to press, skewed and have low sensitivity, .

5. Check if iPhone is locked iCloud

iCloud  is a service used to synchronize data such as messages, photos, . between devices using iOS together with the Find My iPhone feature to restrict users from buying or using iPhone devices. stolen.

To check iCloud,  reset your iPhone by:

Step 1 : Go to Settings > Select General .

Step 2 : Select Reset > Tap Erase all content and settings > Select Backup then delete or Erase now .

6. Check iPhone IMEI

Checking the iPhone IMEI is very important and cannot be ignored to make sure the iPhone you are about to buy has not been replaced. There are 2 ways to check IMEI, namely:

Option 1 : You can open the caller and enter * # 06 # syntax to get IMEI iPhone.

Method 2 : On your iPhone, go to Settings> General> About then scroll down to find the IMEI item to check.

7. Check iPhone sensor

Make a phone call and then listen to see if the speaker is in and turn on the speaker to check.

Next, to check the sensor, you still leave the phone calling like that and cover the sensor with your hand if the screen turns off, opening the screen back to normal which means the light sensor is active. good.

8. Check out basic iPhone features

- Insert your SIM and try to make or receive calls to check the quality of the speakerphone.

- Turn on music or video to check the status of the speakerphone.

- Use the photo capture application, check the quality of the front camera, the rear camera, the ability to autofocus to ensure the camera is working well.

- Plug in the device's accessories such as charger cable , charger , headset , . to see if it works normally or not.

The above article has shown you how to test your old iPhone before you buy. Hope the article helps you!

Good luck.