Fix: Samsung Galaxy A12 No SIM Card Detected Error

Samsung Galaxy A12 was released in Q4 2020, runs on Android 10 out of the box, and is now running on Android 11 (One UI 3.1), which packs MediaTek Helio P35 SoC.

Having mid-range or higher-end phones like Samsung does not guarantee that the devices will not fall victim to any issues. The devices have faced issues in the past, and one of the most common problems is the no sim card detected error. Whether the Galaxy A12 is not detecting a sim card or throwing errors like No Service or No signal detected, we’ve listed some fixes to eliminate those issues.

In most cases, the sim card-related errors like No Sim Card Detected, No Service, etc., can be easily fixed. But, sometimes, the problem occurs when the sim card is damaged or there’s some network issue in your area. In any case, applying the fixes we have listed below is worth applying.

Fix: Samsung Galaxy A12 No SIM Card Detected Error

Samsung Galaxy A12 Specs Overview

The Samsung Galaxy A12 is a budget phone with no AMOLED here. Instead, we get a 6.5-inch HD+ TFT display. In terms of performance, we will see an octa-core processor here, but we don’t know anything specific about this processor. Reports have said that it is the MediaTek Helio P35, but we will have to wait until the launch to get the official information. This phone will come in three RAM and storage variants: 3GB + 32GB, 4GB + 64GB, 6GB + 128GB. There is a MicroSD slot for storage expansion of up to 1TB.

In terms of optics, the Samsung Galaxy A12 offers a quad-camera setup in the rear consisting of a 48-megapixel primary sensor with an f/2.0 lens, a 5-megapixel sensor with an ultrawide angle f/2.2 lens, a 2-megapixel macro sensor with an f/2.4 lens, and a 2-megapixel depth sensor with an f/2.4 lens. Towards the front side of the phone, we get an 8-megapixel shooter with an f/2.2 lens in a small notch.

The phone’s fingerprint sensor is located on the side of the phone. And this is not a 5G ready phone. So in terms of connectivity, we get only LTE, Wi-Fi, Bluetooth, GPS, and all other essentials. A 5,000 mAh battery with support for 15W fast charging is powering it all up. This smartphone will be available in four color variants: Black, Blue, Red, and White.

Here’s what to do if your Samsung Galaxy A12 is not detecting SIM card

Fix 1: Turn Airplane Mode on and off

Whenever you face any sim card or network-related issues, you should 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 the Airplane Mode, Navigate to Settings > Connections > Airplane Mode and tap on the toggle next to the Airplane Mode. Alternatively, you can turn on the feature from 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 Samsung Galaxy A12 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 Samsung Galaxy phone, press and hold the power button and volume down (-) button 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 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 to be unable to detect a sim card. Thankfully, Samsung 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 Samsung Galaxy A12, go to Settings > General management > 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 often works with software-related issues, including the No Sim Card Detected issue on your Samsung Galaxy A12.

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 factory reset your Samsung Galaxy A12, navigate to Settings > General Management > 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 Samsung Galaxy A12. In the comments below, let us know which method did the trick for you.


  1. After uninstalling Magisk on my Samsung Galaxy A12, phone no longer has network but displays emergency calls only. Please how do I resolve the issue.

  2. Did all of the above. Still the sim 2 slot of my Samsung Galaxy A12 is showing emergency call. Any other solution

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