In this guide, we will explain how to solve an undetected SIM card problem. There are several reasons why your Android device will not read the SIM card. Some possible causes could be that you did not insert the SIM card correctly, or that your Android device is experiencing a software problem. Whatever the reason, a solution must be found quickly.
Here are some fixes for when your Android phone cannot detect the SIM card.
Basic fixes to no SIM card detected Error
If the cause of your SIM card error is a software problem, sometimes a simple reboot is enough to solve the problem. Press and hold the power button until the pop-up window appears with the “Restart” option. Press it to restart the phone. If the phone does not have a “Restart” feature, turn the phone off, wait 30 seconds, then turn it back on.
Wait until your Android device tries to connect to the network again and hopefully you will not see the SIM card error again. If you still see the error message, try the following methods.
Remove the SIM card and battery
Another basic solution you can try is to remove the battery (if removable) and the SIM card. Before doing so, make sure you have turned off your Android device. Once you’ve removed everything, wait about a minute and reinsert everything again.
Dropping your phone is a common practice, but even if there was no damage, the SIM card could have been moved. A cheap and unique method that many have tried to add paper or even tape to get a tighter fit. This usually makes the SIM card look nice and tight and solves the problem.
Try to use your phone in safe mode
Unfortunately, not all the applications you install work well. Some applications can cause more harm than good and cause this error. Start your device in Safe Mode.
Stay in safe mode for a few hours and see if you continue to have this problem. If not, try to remember the last applications you installed and uninstall them. Exit safe mode and see if you continue to have this problem.
Airplane mode solution
If you have tried all the basic patches above and are sure that the SIM card is not to blame, it is time to try the solution in airplane mode. Scan down from the top of your screen (once or twice depending on where you placed the icon) and turn it on.
Depending on the version of Android you have, you may or may not receive a warning message when you turn on airplane mode. Turn it on and leave it on for about 30 seconds. When you turn it off, your Android device will start searching for a network, and hopefully the SIM card error will be fixed.
Changing the network mode to Auto
Changing the network mode to automatic mode is another method you can try. You can do this by going to Settings > Mobile Networks > Network Mode and choosing the first option, which will be LTE/WCDMA/GSM (automatic connection).
Corrected the SIM card error by clearing the cache.
Erasing the cache of your Android to try to repair the card error without SIM is extremely simple. Go to Settings > Storage > Internal Storage > Cached Data. When you tap the cached data, you get a pop-up window telling you that this will clear the cache for all applications on your device. Just tap Ok to skip through it.
Choose the correct network operator
If the network operator you are with is not the one selected in the settings of your Android device, you will certainly get the SIM card error. To make sure you have the correct one, go to Settings > Mobile Networks > Network Operators > Network Search. Once your Android device has completed the search and displays the results, tap your operator.