Modern smartphones based on the operating system Android have become much more complex in terms of interface organization compared to models five years ago. Users often encounter a situation where they need to quickly change the network mode from 3G to 4G, check the balance or change PIN code, but the usual "SIM card" icon has disappeared somewhere. This is due to the fact that manufacturers, such as Samsung, Xiaomi and Huawei, constantly modify their proprietary shells, hiding the basic settings deeper in the system menu.
In this article we will look in detail where exactly to look for the mobile communications control section in different versions interface. You will learn not only standard navigation paths, but also ways to solve problems when the device does not see the installed module at all. Understanding the menu structure Settings will save you time and nerves when setting up a new gadget for the first time or when moving to an area with poor coverage.
It is important to immediately note that the name of the section may vary depending on the firmware version and localization. Somewhere it will be “Mobile network”, and somewhere just “SIM cards”. We will look at all the main options so that you can find the item you need regardless of the brand of your smartphone.
Standard path in pure Android and stock firmware
On smartphones with "clean" Android, such as the line Google Pixel or devices from Motorola, the menu structure is as logical as possible and is close to the standard set system developer. To get to the desired menu, you need to open the application Settings and scroll down the list to the section often called "Network and Internet". This is where all the parameters related to wireless connections are concentrated.
Inside this section you will see a subsection Mobile network. Clicking on it will give you access to the mobile data switcher, roaming settings and selecting your preferred network type. If your device has two SIM cards, then above this item there is usually a block "SIM cards"where you can assign a default card for calls and the Internet.
Sometimes manufacturers group these settings differently. In some cases, the path may look like Settings → Connections → SIM card manager. This is typical for older versions of shells or specific regional firmware. The main rule is to look for keywords related to the network or directly to the abbreviation SIM.
If you cannot find the item you need, use the search bar at the top of the "Settings" menu. Enter the request “SIM” or “Mobile network”, and the system itself will redirect you to the desired section.
Interface features in the Samsung One UI and Xiaomi MIUI shells
Large manufacturers often radically change the menu logic to differentiate their products. Owners of smartphones Samsung with shell One UI should pay attention to the section Connections in the main settings menu. Here is the item "SIM card manager", which allows you not only to turn slots on and off, but also to set names for operators, which is convenient when using cards from different countries.
Device users Xiaomi, Redmi and Poco with a shell MIUI or HyperOS face a slightly different structure. Here, SIM card settings are often placed in a separate large block at the very top of the menu Settings, which is called - SIM cards and mobile networks. This is done for quick access, since the audience of these brands often uses the dual SIM card function.
Inside this menu, you can configure the behavior of each card in detail. For example, for one card, enable only voice communication, and for the second, leave only mobile data. An important parameter is also available here Preferred network type, which allows you to force the phone to switch to 4G only or 3G onlymode, which sometimes helps to catch a signal in areas of unstable coverage.
PIN and lock management SIM cards
One of the most important functions in the SIM card menu is access security management. Many users ignore the installation PIN code, however, this security measure prevents unauthorized persons from using your SIM card if your phone is stolen or lost. Security settings are located directly in the SIM card management menu, which we discussed above.
To activate the code request when turning on the device, you need to find the switch SIM card blocking. When you first enable this function, the system will ask you to enter a standard code, which is usually indicated on the plastic card holder issued by the telecom operator (often this 0000 or 1234). After activation, the phone will request this code every time it reboots.
The code change function is available in this section. If you suspect that your current code has become known to other people, or simply want to set a more complex combination, select item "Change SIM PIN code". The system will require you to enter the old code and then the new one twice. Be extremely careful when entering: entering the wrong code three times will block the card and require you to enter PUK code.
What to do if you forgot your PIN code?
If you entered the wrong one PIN code three times, the SIM card will be blocked. To unlock, you will need a PUK code. It can be found on the SIM card packaging, in the operator’s personal account on the website, or obtained by calling the support service from another phone. Entering the wrong PUK code 10 times leads to a complete irreversible blocking of the SIM card, and then you will have to go to the communication store for a replacement.
⚠️ Attention: Never try to guess the PUK code by brute force. The limit of attempts is strictly limited by the hardware of the SIM card, and after the limit is exhausted, the chip permanently fails.
Setting up network modes and APN access points
Often users wonder where the SIM card menu is on Android, because their mobile data does not work, although calls are going through. In most cases, the problem lies in incorrect settings of the access point APN. These parameters tell the phone through which gateway to connect to the Internet of a particular operator. You can find them in the menu Mobile network → Access points (APN).
Usually modern smartphones automatically load the correct settings when installing a new SIM card. However, if you have flashed your device or are using a rare carrier, the list may be empty. In this case, you need to create a new access point manually by entering the data obtained from the official website of your provider. After creation, do not forget to activate it by clicking on the circle to the left of the name.
Also in this section, the preferred network type is adjusted. The default value is 5G/4G/3G/2G (auto), which allows the phone to choose the best available standard. However, in some cases, such as when traveling or in buildings with thick walls, automatic selection may not work correctly, constantly losing signal. Then it makes sense to manually set the mode 4G only or 3G only.
☑️ Checking the settings Internet
Diagnostics of problems with displaying a SIM card
There are situations when the phone writes “No SIM card” or “Insert SIM card,” although it is physically installed. Before taking the device for repair, it is worth checking the software settings. Go to the SIM card management menu and make sure that the slider next to the desired slot is active. Sometimes, after a system update, the settings may be reset, and the slot is software disabled.
If the slider is active, but the card is not detected, try removing the tray and wiping the SIM card contacts with a soft, dry cloth. Contact oxidation is a common cause of unstable operation. Also check if you cut the card correctly if you used an adapter or cut it yourself. An incorrect shape may cause the card to not fit tightly into the contacts in the slot.
In rare cases, the problem may be a software conflict. Resetting your network settings may help resolve this issue. To do this, go to Settings → System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settings. This operation will not delete your personal data, but will return all network settings to factory settings.
⚠️ Attention: Resetting network settings will delete all saved passwords from Wi-Fi networks and paired Bluetooth devices. You will have to connect to them again.
Comparison of menu capabilities in different versions of Android
The SIM card management interface evolves with each new version of the operating system. Below is a table that will help you navigate where to look for settings depending on the version of your Android. Please note that manufacturers may make their own adjustments, so item names may vary slightly.
| Android version | Main section | Subsection name | Features |
|---|---|---|---|
| Android 10-11 | Network and Internet | Mobile network | Separate control for each SIM |
| Android 12-13 | Connections | SIM card manager | Convenient switching of profiles |
| Android 14+ | Network and Internet | SIM cards | Integration with eSIM in one menu |
| One UI (Samsung) | Connections | SIM card manager | Advanced settings roaming |
As can be seen from the table, the general logic remains the same, but the names may change. In the latest versions of the system, such as Android 14, there is a tendency to combine the settings of physical and virtual SIM cards eSIM in a single interface. This simplifies management for users who travel frequently and connect local tariffs without purchasing plastic media.
If you have updated to a new version of Android and cannot find the old settings, use the menu search - this is the fastest way to adapt to interface changes.
⚠️ Attention: Manufacturer shell interfaces are updated regularly. If the described paths do not match your screen, check for system updates or refer to the help of a specific manufacturer, since the location of the items may change at any time.
Frequently asked questions (FAQ)
Why does the phone not see the second SIM card, although it is in the settings is enabled?
This can happen for several reasons. First, check the physical placement of the card in the tray. Secondly, some smartphone models have a hybrid slot: if you install a microSD memory card in the second slot, the second SIM card will not work. Thirdly, perhaps the card does not support the frequencies on which your phone operates in this region.
Is it possible to rename a SIM card in the settings?
Yes, in most modern versions of Android and shells (MIUI, One UI), the function of renaming SIM cards is available. This is convenient for distinguishing cards, for example, “Work”, “Home” or by operator name. You can find this option in the menu SIM card manager or SIM cards.
How to check the IMEI code of a SIM card through the menu?
It is important to clarify: The SIM card does not have an IMEI, this code belongs to the phone itself. However, in the menu About phone → SIM card status you can see the ICCID (serial number of the SIM card itself) and IMEI of the device to which it is currently connected. You can also find out this data by typing the universal code *#06# in your phone.
What to do if the "Mobile network" item is gray and cannot be pressed?
If the mobile network settings are grayed out, you most likely have Airplane mode enabled. Disable it in the notification shade. This can also happen if the SIM card is damaged or not detected by the system. Try rebooting the device.