Finding settings related to SIM card management often causes difficulties for smartphone users, since the location of these options changes depending on the version of the operating system and the manufacturer's shell. If you are looking for where SIM menu on Android, it is important to understand that this term can mean two different concepts: a hidden engineering menu for checking the card status or a standard settings section for managing PIN codes and contacts. The standard Android interface has evolved over the years, moving items from one section to another, which confuses even experienced gadget owners.
In this article we will analyze in detail all the possible ways to access managing your SIM card, starting from classic settings and ending with special codes that allow you to access service information. You'll learn how to safely change your PIN, transfer contacts, or unlock your device if it's locked. Since the interface Samsung One UI, Xiaomi MIUI and pure Android is different, we will look at universal methods and specific features of popular brands.
The classic path through the device settings
The most reliable and safe way to find SIM card management is to use the standard settings menu. In most modern smartphones, the path runs through the section responsible for connections. You need to open the Settings application and find the item, which may be called Connections, Network and Internet, or SIM cards and mobile networks. This is where the main parameters that affect the operation of your mobile network are hidden. After going to this section, the system will display a list of installed SIM cards if the device supports Dual SIM technology. By clicking on a specific card (for example, SIM 1 or SIM 2), you will be taken to a detailed menu. There are typically toggles available here for activating or deactivating the card, selecting a data network and, most importantly, managing security. You can enable the request mobile network.
After going to this section, the system will display a list of installed SIM cards if the device supports Dual SIM technology. By clicking on a specific card (for example, SIM 1 or SIM 2), you will be taken to a detailed menu. There are typically toggles available here for activating or deactivating the card, selecting a data network and, most importantly, managing security. You will be able to enable the request PIN code when you turn on the phone or change it to a more convenient one.
⚠️ Attention: If you enter the PIN code incorrectly three times, the SIM card will be blocked. To unlock, you will need a PUK code, which is located on a plastic card holder issued by the telecom operator.
Write down the new PIN code in a safe place immediately after changing, since it is impossible to restore a forgotten code through the phone settings without a PUK.
It is worth noting that on some devices with shells from Chinese manufacturers, such as Redmi or Realme, the path may be slightly different. Sometimes the necessary item is hidden in the “Passwords and Security” or “Special Features” section. If you cannot find the item you need in obvious places, use the search bar at the very top of the settings menu by entering the query “SIM” or “SIM card.”
Using USSD codes to access the service menu
In addition to the graphical interface, there is a faster and deeper way to interact with the SIM card - entering special commands. These codes, known as USSD requests, allow you to open the SIM card service menu directly, bypassing the phone settings. This is especially useful if the phone interface is frozen or does not display the necessary options due to a software error.
The most common code for calling the SIM card management menu is ##4636##. Entering this combination in the Phone (dial) app will usually open a hidden test menu. In it you can find the “Phone Information” section, which displays details about the signal, network type and SIM card status. However, this code does not work on all devices; some manufacturers, for example Huawei or new models Samsung, can block its operation.
- 📞
*#06#— instant display of the device IMEI and ICCID of the SIM card (unique card number). - 🔒
**04*— command to change the PIN code (requires entering the old and new code). - 📶
##4636##—enter the engineering menu to check the status of the network and SIM card.
There are also codes specific to managing contacts and locks. For example, to check the status of call forwarding or blocking, codes like #33# or #43#are often used. It is important to understand that these commands are sent to the telecom operator, and their execution depends on the tariff plan and network settings. Not all codes are universal, and the reaction to them may vary from MTC, Beeline, Megafon or Tele2.
What to do if the code does not work?
If nothing happens when you enter the code or a connection error message appears, then your firmware is blocking this request. Try entering the code in the Phone application and pressing the call button, or use the standard Android settings.
Be extremely careful when using USSD codes. Accidentally activating certain features, such as completely blocking outgoing calls or disabling caller ID, may cause inconvenience. If you are not sure of the purpose of a specific command, it is better to refrain from using it and refer to your operator's documentation.
Managing contacts on a SIM card
One of the common tasks that users encounter is transferring or deleting contacts stored directly on the SIM card chip. In modern smartphones, storing contacts on SIM is considered an outdated method due to limited memory space and the inability to store additional data such as photos or email addresses. However, access to this functionality is still necessary when changing devices.
To find this section, go to the Contacts application. In the application menu (usually three dots or bars in the corner of the screen), select “Settings” or “Manage contacts”. Here you will see the options “Import/Export contacts” or “Copy contacts”. The system will prompt you to select a source and destination: for example, copy data from SIM card to phone memory or to account Google.
| Action | Menu path (example) | Restrictions |
|---|---|---|
| Copy to phone | Contacts → Settings → Import from SIM | No volume restrictions |
| Delete from SIM | Contacts → Filter → SIM only → Delete | Requires confirmation |
| Editing | Not available directly on SIM | Needs to be copied to phone |
Please note that direct editing of names recorded on the SIM card often impossible. The Android system usually requires you to first copy the contact to internal memory, edit it there, and then save it back to the card if necessary. This is due to the technical limitations of the on-chip data storage format, which was developed decades ago.
Always keep a backup copy of your contacts in your Google or iCloud account so as not to lose them if your SIM card is damaged or lost.
Security settings and SIM lock
The security of your SIM card is critical important for protection against unauthorized use of the number by attackers. The main protection tool is PIN code. Activating this feature causes the phone to request a code every time it is turned on or after the card is removed. You can find this switch in the SIM card settings section, which we talked about in the first section, in the “SIM card blocking” subsection.
In addition to the PIN code, there is a concept PUK code. This is a master key that is only used if you have forgotten your PIN and blocked your card. You can enter the PUK code directly on the phone's lock screen after several unsuccessful attempts to enter the PIN. The settings menu also often contains the “Change PIN” option, which allows you to set a more memorable combination of numbers.
⚠️ Attention: Never try to guess the PUK code by brute force. After 10 incorrect attempts, the SIM card will be permanently blocked and cannot be restored - you will have to get a new one from the operator.
On some devices with processors Qualcomm or MediaTek advanced settings for encrypting data on the SIM card are available, although in consumer versions of Android they are often hidden. If your phone is used for corporate purposes or storing sensitive data, make sure the SIM card lock feature is activated. This will prevent your number from being used to receive verification codes from banking applications if your phone is stolen.
Features of interfaces from different manufacturers
Searching for a SIM card menu may differ significantly depending on which brand your smartphone was released. Manufacturers often rename standard Android sections or change their hierarchy to suit their design. Let's look at where to look for the necessary settings on the most popular devices.
On smartphones Samsung with the One UI shell, the path usually looks like this: Settings → Connections → SIM card manager. All settings are collected here, including choosing a default network and PIN management. In devices Xiaomi, Redmi and POCO with MIUI, the section is often called “SIM cards and mobile networks” and is located in the main list of settings or in the “Connections and sharing” group.
- 📱 Samsung: Settings → Connections → SIM card manager.
- 🤖 Pixel / Motorola: Settings → Network and Internet → SIM cards.
- 🌀 Xiaomi / Redmi: Settings → SIM cards and mobile networks.
Device owners Huawei and Honor should look for the “Wireless Networks” or “Mobile Network” section. In older versions of the EMUI shell, SIM card settings could be placed in a separate main menu item. If you are using a smartphone with custom firmware, the location logic may be broken, and then the only correct solution is to use a search in the settings.
Solving problems with displaying the SIM menu
Sometimes users are faced with a situation where the phone does not see the SIM card, and, accordingly, the settings menu for it is inaccessible or inactive. This could be caused by either a software glitch or a physical problem. Before you panic, try removing the SIM card tray, wiping the card contacts with a soft cloth and inserting it back, making sure it is installed correctly.
If the SIM card menu in the settings is grayed out (inactive), check if your phone is in Airplane mode. In this mode, all wireless modules are disabled and network settings become unavailable for editing. Also, the cause may be a malfunction of the radio module, which is often solved by simply rebooting the device.
⚠️ Attention: If after rebooting the phone continues to write “No SIM card” or “Invalid SIM card,” the card chip may be damaged or the contact in the phone slot has oxidized. Try checking the card in another device.
In rare cases, the problem lies in incompatible standards. Old SIM cards of format Mini-SIMcut to size Nano-SIMmay not work correctly in new smartphones due to different thicknesses or misalignment of contacts. In such a situation, the only correct solution is to contact the operator’s communication salon to replace the card with a new one for free.
☑️ Diagnosis of problems with SIM
Frequently asked questions (FAQ)
How to find the PUK code if I lost a plastic card from operator?
The PUK code can be found in your personal account on the website of your mobile operator in the tariff or SIM card information section. You can also find out by calling the support service from another number of the same operator. You need to enter it very carefully, since the number of attempts is limited.
Is it possible to completely disable the PIN code request when turning on the phone?
Yes, this can be done in the SIM card settings. Find the "SIM Card Lock" item and turn the switch to the "Off" position. The system will ask you to enter your current PIN to confirm the action. After this, the phone will boot without asking for a code.
Why doesn’t the code work ##4636## on my Android?
Many manufacturers (Samsung, Huawei, Xiaomi) block access to the engineering menu in standard firmware versions for ordinary users. This code can work on Google Pixel series smartphones or on devices with an unlocked bootloader and custom firmware.
Where are contacts stored: on the phone or on a SIM card?
By default, modern smartphones save contacts to the device’s internal memory or synchronize them with a Google account. Storage on a SIM card is rarely used due to the small amount of memory and lack of support for additional fields (photo, email).