Owners of smartphones Xiaomi, Redmi and POCO Often faced with the need to fine-tune the parameters of mobile communication, one of these tasks is to control the display of the SIM card menu or disable the request. PIN-The code when you turn on the device. MIUI or the new HyperOS may hide some options, making the process unobvious to the average user. SIM-map.
There are several scenarios where you need to interfere with the SIM card settings, from the banal desire to remove the annoying pin-code notification to the complete locking of the communication module. PIN-The code only occurs once the correct activation code provided by the operator has been entered.
In this article, we will take a look at all aspects of working with the SIM card menu. We will look at the standard setting methods, hidden features of the engineering menu and how to solve problems when the phone constantly requests a code or does not see the card. Follow the instructions carefully so that you do not disrupt the communication module of your device.
Disabling the request PIN-code when turning on the phone
The most common reason why users want to “turn off” the SIM card menu is an annoying request. PIN-This security feature protects your data in the event of a device being stolen, but it is inconvenienced by frequent reboots.
Go to the main settings of the device and find the section responsible for the security settings. MIUI, The path may be slightly different, but the logic remains the same for all models. PIN-If you haven't changed it yourself, it's often a combination of 0000 or 1234 by default, but it's best to check with the operator or on the plastic card holder.
Once the code is successfully entered, the system will suggest switching the switch to an inactive state, which will remove the lock from the communication module at the software level, and now, with each reboot, the smartphone will automatically activate the network without additional user intervention.
☑️ Pre-switch check PIN
The process of disabling protection is as follows:
- 📱 Go to the Settings menu of your device.
- 🔒 Select Passwords and Security or Privacy Protection.
- 💳 Click on the Privacy section SIM-card or lock SIM-map.
- 🔓 Transfer the switch to the “off” position and confirm the action with the current code.
⚠️ If you are not in the faith three times. PIN-code, SIM-The card will be locked. PUK-code that can be found on a plastic card or in the operator’s personal account.
Hiding the icon SIM-notecard
Many users prefer a minimalist interface and tend to remove unnecessary icons from the status bar. SIM-It's not disabling the card itself, but visually clearing the top panel of the screen.
To implement this feature, you will need access to advanced interface settings. This option may not be standard in the normal settings menu, so we will turn to the hidden status bar settings menu. This is secure and does not require root permissions or flashing the device.
Use a built-in settings searcher or a special code to log into a hidden menu. In the settings list that opens, find the section that displays the items at the top of the screen, and you can flexibly adjust the visibility of each item, including the watch, battery, and, of course, SIM card indicators.
Algorithm for hiding the icon:
- 🔍 Open the Settings app and type the word “status bar” in the search».
- 📶 If the search is not successful, use the code ##64663## to enter the engineering menu (not on all models).
- 👁️ Find the "Show" switch SIM-map.
- ✅ Remove the tick or transfer the switch to the position "Hide».
After the changes are applied, the status bar will be updated instantly. The icon will disappear, but the signal level and network type (4G/LTE/5G) can remain visible depending on the firmware version. This is normal behavior of the Android system.
Removal or disabling of the second SIM-map
Xiaomi smartphones often feature a hybrid slot or support two active SIM cards at the same time. There are situations where a second card needs to be temporarily disabled without being physically taken out of the tray, for example, to save battery power or to avoid roaming costs while traveling.
Software disabling the second SIM card completely stops its work: it will not receive calls and SMS, and mobile Internet will switch to the main card or Wi-Fi. This is a regular feature available in the SIM-card management menu.
In the same settings section, you can change the priority of cards for voice calls and data transfers, and the system allows you to flexibly configure use cases, creating profiles for work and personal life, switching between them takes a few seconds.
| Parameter | Description of action | Impact on the system |
|---|---|---|
| Turn off the SIM | Full software lock of the slot | No grid, power savings |
| Default calls | Choosing a map for outbounds | Changing call routing |
| Mobile data | Choosing a map for the Internet | Change of access point to the network |
| SMS default | Message map | Write-off of funds from the selected account |
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If you travel frequently, create a separate settings profile or simply turn off the second one. SIM-map before crossing the border to avoid accidental connection to expensive local networks.
Configure operator names and displayed data
Sometimes, a standard display of the operator name (such as “MTS RUS” or “Beeline”) takes up too much space or simply does not like the user. MIUI settings provide the ability to edit the displayed name for each SIM card individually, which helps you to quickly navigate which card is active at the moment.
To change the name, go to the control menu SIM-You'll see a list of connected modules there, and if you click on the operator's name, you can type in any text ID, which is especially useful for two cardholders of the same operator, but with different rates.
In addition, you can customize the color of the icon for each SIM card in this section, visual encoding allows you to see at a glance which card will be called, and the system offers several color schemes that apply to the icon in the curtain and in the dial menu.
The customization process looks like this:
- 🎨 Go to Settings. → SIM-maps and mobile networks.
- ✏️ Click on the operator name under the desired SIM card.
- 📝 Enter a new name (e.g., “Work”, “Home”, “Internet»).
- 🌈 Choose your preferred color marker from the suggested palette.
⚠️ Note: The operator name change only happens locally on your device. The subscriber at the other end of the wire will still see your real number, not the name you invented.
Using the Engineering Menu for Diagnostics
If standard methods don't solve the problem with the SIM menu, you can use the Engineering Menu, which is a powerful tool for diagnosing and deep tuning the communication modules in Xiaomi smartphones, where you can check the status of registration in the network, signal strength and switch the preferred type of network.
To enter the engineering menu, a special set of commands is used in the Phone application. Be careful: changing unknown parameters can lead to unstable communication, it is recommended to change only those settings in which you are sure, or act strictly according to instructions.
One useful feature is checking the status of the IMEI and resetting the radio module. If the phone stopped seeing the SIM card or constantly writes “No network”, resetting the network settings through the engineering menu often helps to restore health without completely resetting the phone.
Secret Codes for Engineering Menu
The main commands for working with the network:
#4636### - Android Test Menu
*#06# - Checking the IMEI number
#7262626### - Network status check (CMCC Test)Use these tools wisely. If you accidentally change an important parameter and the connection is gone, try simply restarting the device or re-extracting and pasting the SIM card again, and in most cases, the system will restore the correct values when restarting.
Problem Solving: Phone Can't See SIM or Constantly Asks for Code
A situation where the SIM card menu is stuck or the phone is endlessly requesting code may indicate a software failure or physical malfunction. Before you carry the device to the service, try to perform a series of troubleshooting actions. Often the problem is solved by simply cleaning contacts or resetting network settings.
First, check the physical condition of the SIM card. Take out the tray, wipe the contacts of the card with a soft dry cloth. Make sure that the golden contacts do not have deep scratches or oxides. Also check the tray itself - it should sit tightly in the case.
If the card is physically intact, try resetting your network settings. This action will delete saved APN access points and Bluetooth passwords, but return the communication module to its original state. In the settings menu, find "Reset settings Wi-Fi, mobile Internet and Bluetooth".
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80% of cases have a problem with a constant request PIN-The code is replaced by the old SIM-cards for a new one in the operator’s cabin, as the card chip wears out over time.
Checklist of actions in case of SIM card errors:
- 🔄 Restart your smartphone in Safe Mode to eliminate the impact of third-party apps.
- 📲 Check the SIM card in another phone to prevent the card itself from breaking.
- ⚙️ Reset network settings through the restore menu or system settings.
- 🛠️ Update your device firmware to the latest available version via the About Phone menu».
If none of these methods worked, the SIM card reader itself may have been damaged on the motherboard, requiring professional diagnostics at an authorized service center, and self-repairing the slot requires a microscope and soldering equipment.