Fix: OnePlus 9 and 9 Pro No SIM Card Detected / Not Working Issue

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

Fix 2: Perform a soft reset

Soft reset (also called Force restart) is more effective than performing a normal reboot. The No Sim Card Detection Error on your OnePlus 9 and 9 Pro could result from a system 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 OnePlus 9 and 9 Pro phone, press and hold the power button and volume down (-) button for a few seconds. Release your fingers from the buttons once the OnePlus logo appears on the screen. Let the device reboot itself, 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 found any damage on the sim card, replace it by going to the respective carrier’s store. Otherwise, move on to the following method.

Fix 4: Reset network settings

Some changes in the network settings might have caused the device not to be able to detect a sim card. Thankfully, OnePlus offers an easy way to reset all the changes. By resettings network settings, you will lose access to Wi-Fi passwords, paired devices, etc.

To reset network settings on your OnePlus 9 and 9 Pro, go to Settings > Reset > Reset network settings > Tap on Reset settings.

Fix 5: Factory reset

If none of the methods has worked for you, we are left with the factory reset option. This method works most of the time with software-related issues, including the No Sim Card Detected issue on your OnePlus 9 and 9 Pro.

By performing a factory reset on your phone, you will lose access to all your data. Therefore, take a complete backup of your phone before using this method. To reset your OnePlus 9 and 9 Pro, navigate Settings > Reset > Factory Data Reset. After that, the device will take a couple of minutes to complete the process. Ensure that the device has at least 50% battery, as the process can sometimes take longer than usual.

We believe that one of the methods would have helped you fix the issue on your OnePlus 9 and 9 Pro. Let us know which method did the trick for you in the comments below.