Dot(s) or spot(s) on the screen (Mobile device)

If you see odd dots on your screen and you're absolutely sure they're not dirt, the first thing you should do is to check if these dots are stuck or dead pixels. 

A pixel consists of three sub-pixels: red, green and blue, so a stuck pixel will appear in on of these colours. 

In a dead pixel all the sub-pixels are off, so it will be black. Sometimes, however, even a black pixel may just be stuck.

So, a colored or white pixel might be fixed. If you see a black pixel, you should check if you can fix it.

You can use LCD to find and fix stuck pixels. It is an online tool, so you don't need to download it, just click here to access it. It's very easy to use - click ? & i, and you'll find all the needed information.

The dot or dots may be caused by a software/app you've recently downloaded and installed. To check if this is the reason, start your device in Safe Mode, where only the pre-installed software/apps will run. If there aren't any dots on the screen in Safe Mode, then the dots are caused by a software/app you've downloaded. You need to find out which one is responsible for it and uninstall it.

Check out the don't know how to boot in safe mode guide if you are not sure how to boot into Safe Mode.

If you see odd dots on your screen and you're absolutely sure they're not dirt, the first thing you should consider doing is to check if these dots are stuck or dead pixels. 

A pixel consists of three sub-pixels: red, green and blue, so a stuck pixel will appear in on of these colours. 

In a dead pixel all the sub-pixels are off, therefore the pixel will be black. Sometimes, however, even a black pixel may just be stuck.

So, a colored or white pixel might be fixed. If you see a black pixel, you should check whether you can fix it, anyway.

Use Online Monitor Test - it's a very thorough test that not only identifies bad pixels, but it can also test the quality of your monitor.

There are three different modes to test your monitor into. Click HTML window to test for stuck pixels. Press F11 to toggle full-screen. You'll see a range of different shades of grey. If you move the mouse to the top of the test window, a menu will appear. Click on Homogenuity and go through all the colours from the list.

If you find something out of ordinary, then open JScreenFix and click Launch JScreenFix at the bottom of the page, and it will open a black browser window with a square of flashing pixels. Press the green button in the bottom right corner to go full-screen. Drag the flashing square to where you found the stuck pixel and leave it there for at least 10 minutes.