How to see a memory SIM-Xiaomi maps: The full guide

Owners of smartphones Xiaomi, Redmi and POCO Often faced with the need to transfer old contacts or find out the exact number of free cells on the physical SIM-In modern versions of the shell. MIUI HyperOS developers often hide direct links to SIM card memory management, relying on cloud synchronization, but access to this data is still possible through system settings or special engineering codes.

Understanding how data storage works on an operator chip is critical when changing devices or switching to a new tariff while saving the phone book. The standard interface may not display detailed fill information, requiring the user to dive deeper into the system settings. We will look at all the available ways to access this information without losing data.

Keep in mind that the amount of memory is built into the card itself, and depends on the year of release and operator. Modern cards can store up to 500 contacts, whereas old samples are limited to 250 records. Below we will describe in detail how to check this parameter on your device.

The standard path through the contact menu

The safest and most affordable way to check what is stored on a SIM card is to use the built-in Contacts app, which doesn't require root rights or third-party software installations. You need to open the app, go to display settings and contact management, and often hides the import or export option, which indirectly shows the content.

Click on three dots in the corner of the screen or menu button, then select Settings. In the list that opens, look for Import and Export Contacts. When selecting Import from SIM-If the list is empty, the memory is empty or the contacts are only stored in your Google account.

⚠️ Note: When attempting to import, do not confirm the action unless you plan to duplicate the entries in your phone's memory.

For a more detailed view, you sometimes need to go to editing a specific contact, so if the contact is saved on the SIM card, the source will be specified in the "Save in" field, which allows you to know exactly where the number is physically located.

• 📱 Open the Contacts app on the home screen.
• ⚙️ Go to the settings menu via the gear icon or three dots.
• 📥 Select the "Import/Export" option to view the list.
• 👁️ Visually estimate the number of records available for import.

💡

Use the “Copy Contacts” function to move numbers from the SIM to your phone’s memory, freeing up space on the map for new entries without losing old data.

Using engineering code for diagnostics

A more technical way to get information about the status of the SIM card and its memory is to use the Xiaomi engineering menu, which is designed for developers and testers, so it displays raw data about the communication module. USSD-code that activates hidden test menu.

Enter the combination ##4636##. If the code works, the Test menu will open. Select Phone Information. This shows network status, connection type and SIM status. Although a direct memory counter is rare here, you can see registration status and card type.

##4636##

On some versions of MIUI firmware, the code can be blocked by the operator or manufacturer, in which case the screen will blink and the menu will not open, which does not mean that the diagnostics are broken, but only limited.

It is important not to change the settings in the engineering menu if you are not sure of their purpose.Resetting the preferred type of network or changing the parameters of the radio interface can lead to temporary loss of communication.

Checking through system settings and SIM-map

The third option is available through the basic smartphone settings, which may vary slightly depending on the Android version and shell, and is usually in the mobile network connection section.

Go to Settings. → SIM-Maps and mobile networks. Select an active SIM card. In some regions and firmware versions, there is an "Additional" or "Extended Settings" button. SIM-map" or "Contact management SIM».

This interface allows you not only to view, but also delete or add contacts directly to the chip memory, and it often displays current memory usage in Used/Total format.

💡

Memory. SIM-The card has strict limits on the length of the name and the number of characters in the room, so long names are often cropped when preserving the name.

If you see an error message or a blank screen in this section, it's possible the card isn't reading correctly. Try removing the tray and wipe the SIM card contacts with a soft cloth.

Third-party applications for SIM management

When Xiaomi’s built-in tools don’t provide a complete answer, Google Play apps come to the rescue, and there are utilities that specialize in reading and writing data directly to the SIM card memory, bypassing standard interface constraints.

Popular apps like SIM Manager or Copy My SIM ask for permission to access your phone and contacts, and when they run, they scan the chip and output a detailed report of how many cells are occupied, how many are free, and allow you to edit the records in batches.

• 🔍 Download a proven application to work with SIM shop-in.
• 🔐 Provide the necessary permission to read the phone book.
• 📊 Run a scan to get a memory report.
• 💾 Use the export functions to create a backup copy.

Using third-party software requires caution: Make sure the app has high ratings and positive reviews, as it accesses your personal data.

⚠️ Warning: Avoid apps with suspicious permissions that require internet access to work with contacts SIM. This could lead to your phone book being leaked.

Such programs are especially useful if you need to clear the card before selling or transfer contacts from an old button phone where they are left on the SIM.

Limitations and features of SIM memory

It's important to understand the technical side of the issue. SIM-The Subscriber Identity Module is not a flash memory, but a specialized chip with limited volume. GSM It defines a data storage structure that has remained virtually unchanged for decades.

The main limitation is the format of the data: you can only write a name and a phone number on a SIM card, no photos, email addresses, birthdays or second numbers can be saved, which is why modern smartphones offer to save contacts to a Google or iCloud account.

When you move contacts from the cloud to a SIM card, long names will be cropped and additional numbers lost, a normal behavior driven by an ancient standard of security and storage.

If your phone shows that SIM memory is full, even though you see fewer than 250 contacts, it is possible that some cells are damaged or occupied by the operator's system records.

Frequent problems reading data

Xiaomi users may encounter a situation where the phone says "SIM not found" or "Reading error" when you try the card memory. Often this is due to a software failure of the Contacts service or the system itself.

Try clearing the Contacts and Contact Storage cache through the app menu. Go to Settings → Apps → All Apps → Contacts → Memory → Clear. This won’t delete your numbers, but will reset your display settings.

If the problem persists, perhaps the plastic card itself is physically worn out, the chips have a limited overwriting cycle, in which case the best solution would be to contact the carrier's salon to replace the SIM with a new one while maintaining the number.

In conclusion, SIM card memory management on Xiaomi is possible, but requires understanding the limitations of this media. For reliable data storage, always use cloud synchronization, leaving the SIM card only for initial identification on the network.