What to do when your Galaxy S21 Ultra 5G does not recognize S Pen input on certain screen areas

Before you try the recommendations below, be sure to check if your device's software and related apps are updated to the latest version. Please review the following steps for how to update your mobile device's software.

Step 1. Go to Settings > Software update.

Step 2. Tap on Download and install.

Step 3. Follow the on-screen instructions.

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

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

Screen protectors can sometimes 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.

Learn more about how to use the S Pen with your Galaxy S21 Ultra 5G with Samsung Support.