Fix: Samsung Galaxy S21 and S21 Plus No SIM Card Detected Error

Ever had that moment of panic when your Samsung Galaxy S21 or S21 Plus suddenly displayed a “No SIM Card Detected” error? Yes, that tiny piece of plastic is crucial for connecting you to the world, and it’s pretty frustrating when your phone can’t seem to recognize it. You might think it’s a serious hardware issue or your SIM card is damaged. But hold on! It’s not always as bad as it seems. In fact, there are quite a few quick fixes you can try at home before heading out to a service center. In this article, we’ll guide you step-by-step through these solutions to get you connected again in no time. Ready to wave goodbye to that annoying error? Let’s dive in!

Here’s what to do if your Samsung Galaxy S21 and S21 Plus are not detecting SIM card

Fix 1: Turn Airplane Mode on and off

Whenever you face any sim card or network-related issues, you should first turn on the Airplane Mode and then turn it off. This method does the trick most of the time. This method disconnects your device from the wireless system until the option is not turned on.

To turn on Airplane Mode, Navigate to Settings > Connections > Airplane Mode and tap on the toggle next to Airplane Mode. Alternatively, you can turn on the feature from Quick Settings.

Fix 2: Perform a soft reset

A soft reset (called Force restart) is more effective than a normal reboot. The No Sim Card Detection Error on your Samsung Galaxy S21 and S21 Plus could result from a glitch. Performing a soft reset ends all the running processes, including those responsible for system glitches, which can fix all the sim card or network problems.

To perform a soft reset on your Samsung Galaxy phone, press and hold the power and volume down (-) buttons for a few seconds. Release your fingers from the buttons once the Samsung logo appears on the screen. Let the device reboot, and check if the sim card issue persists.

Fix 3: Remove and re-insert the sim card

Your phone can throw errors such as No Sim Card Detected when the sim card is damaged or misplaced in the sim tray. To rule out this possibility, open the sim tray and check if the sim card is placed as it should be. Also, check for any damage on the card. If you find any damage on the sim card, replace it by going to the respective carrier’s store. Otherwise, move on to the following method.