What to do when your Galaxy S21 Ultra does not recognize s pen input on certain screen areas?

Any third-party cases with magnetic closures or clasps can cause interference with S Pen recognition. If a magnetic case or cover is attached to the device, it is recommended to remove the attached case or cover and try again. 

If you use the S Pen in certain affected by magnetic force, the S Pen may not work.

Screen protectors can cause inconsistent motion and pressure when using the S Pen. If the screen protector on your Galaxy S21 Ultra has the following issues, it is recommended to remove the screen protector.

• Too hard or rubbery surface for writing.

• An uneven surface, which affects consistency.

• The thickness of a screen protector can affect the screen sensitivity.

• A dirty or old screen protector can affect performance.

To learn more about how to use S Pen with Galaxy S21 Ultra, check out the content ‘Enjoy S Pen Writing Experience with Galaxy S21 Ultra’ with Samsung Support.

If you are experiencing unusual behavior on Samsung mobiles, tablets, or wearables, you can send us a question in the Samsung Members app.  

This allows us to take a closer look at what is happening. The data is anonymized and only held for the duration of the investigation. Find out more about sending an error report through the 'How to use the Samsung Members app'.