Changing your smartphone or resetting to factory settings often leaves the owner with a choice of where to keep important phone numbers so they don’t lose them forever. In Xiaomi’s ecosystem and the MIUI shell (or the new HyperOS), this process has its own peculiarities that can confuse a beginner. Data transfer is a critical operation that requires attention to detail and understanding the structure of the device’s storage.
Many users mistakenly believe that numbers are saved automatically in the cloud, but by default Android often suggests storing them in internal memory. Whether you’re planning to stream, sell a device, or simply upgrade to another phone without a Google account, the only reliable physical carrier is the one that you’re looking for. SIM-In this article, we will discuss in detail how to safely and correctly export data.
The procedure does not require the installation of third-party applications and is performed by the standard operating system: SIM-The card has a smaller capacity and supports only basic text data, ignoring photos, email addresses and additional numbers tied to a single contact. SIM limited 14-16 Long names will be cut automatically.
Preparation for data transfer and compatibility check
Before you start manipulating the phone book, you need to make sure that your device is ready to work with the operator's memory card. Modern Xiaomi smartphones use combined trays, and it is important to correctly install the SIM card so that the system recognizes it. Check whether the card is active in the network settings, whether the signal level and the operator's name are displayed.
It is also worth reviewing your current phone book. If you have used voice input or sync from different devices, there may be duplicates in the list. Before exporting, it is recommended to combine duplicate entries so that you do not clog the SIM card memory with copies. To do this, go to the Contacts app, click three dots in the corner and select Tools → Combine Duplicates.
⚠️ Note: Before starting any contact transactions, it is strongly recommended to back up your current phone book to your Google account or save the export file to internal memory.This will protect you from accidental data loss in the event of a process failure.
Make sure you're on SIM-The old cards can hold up to 250 numbers, the modern ones can hold up to 500. If your card is full, the system will give an error when you try to copy, in which case you will first have to delete unnecessary entries directly from the SIM card through the control menu.
☑️ Export readiness
Standard way of copying through the Contacts application
The simplest and most reliable method, which works on all versions of MIUI and HyperOS, is built directly into the regular Contacts app. This path does not require downloading additional software and guarantees format compatibility. To begin, open the application, which usually has a green or white icon with a human silhouette.
In the interface that opens, find the settings menu. Depending on the shell version, it can be a three-dot button in the upper right or lower corner, or a gear icon. You need to find the item responsible for importing and exporting data. In the Xiaomi menu, it is often hidden in the subitem → Settings and exporting contacts.
After entering the control menu, select the option “Export to” SIM-map (or "copy on" SIM-The system will suggest selecting contacts to transfer, you can manually mark individual numbers or use the "Select All" function if you plan to transfer the entire phone book.
- 📱 Open the Contacts app on the home screen.
- ⚙️ Go to the settings via the three-point menu.
- 💾 Select the item "Import and export contacts».
- 📲 Click "Export to" SIM-map and confirm the action.
The copying process can take from a few seconds to a couple of minutes, depending on the number of records, at which time it is not recommended to switch between applications or lock the screen, so as not to interrupt the system process of writing data to the card chip.
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If you have a two-sim phone, the system will ask which one you want. SIM-map (SIM 1 SIM 2) you need to save the numbers. Be careful when choosing a slot.
Use of the SIM-card management menu
In some versions of Xiaomi firmware, access to managing the SIM card contacts is provided in a separate system settings menu, which is convenient because it allows you to see the status of the card's memory and manage it in more detail. To get there, go to Settings. → SIM-maps and mobile networks.
Here you'll see a list of maps installed. Click on the name of the operator you want. The menu that opens often has a "Contacts on" item. SIM-By going to this section, you will have access to the full list of numbers stored directly on the operator's chip.
The interface in this section usually offers a copy contacts or an import button, and the logic is similar to the first, but here you work directly with the communication module, which can be useful if the standard Contacts app is not working properly or is hanging.
| Parameter | Annex Contacts | SIM settings |
|---|---|---|
| Availability | On all versions of Android | Depends on the MIUI shell. |
| Speed of operation | Tall. | Medium |
| Functional | Complete (editing, deleting) | Basic (copying, viewing) |
| Convenience | High. | Requires entry into the settings |
The use of system settings often gives more accurate information about the technical state of the card, for example, shows the real percentage of memory occupancy, which is impossible to see in normal dialing mode.
Dealing with duplicates and format limitations
When transferring data, users often face the unpleasant surprise of having their contacts' names cropped and their photos gone, which is not a bug, but a technical limitation of the GSM protocol used to store data on a SIM card.
The vCard format used in the memory of the smartphone supports recording of many fields: several phones, email, address, photo, ringtone. SIM-The card supports only one text field of the name (usually up to 14 characters in the encoding). GSM 7-bit) All other data is deleted irrevocably when exported.
⚠️ Note: If emoji or special symvods were used in the contact name, when transferring to the SIM It is recommended that important contacts be renamed using only the Latin alphabet or Cyrillic alphabet before export.
Another problem is duplicates. If you had a contact in your phone memory with a number called "Mama." +7... and on SIM-The card has already had contact with another number, after importing you can have two contacts with the same name. Xiaomi has a built-in tool to solve this problem, but it is better to prevent it from appearing.
To clear the list before export, you can use the display filter. In the Contacts app, click three dots and select Contacts to Display. Select Phone Only to see what will be copied, which will help you estimate the amount of work and identify extra entries.
Why can't you save a photo on a SIM card?
Alternative methods and cloud synchronization
While it’s a question of transferring to a SIM card, more modern and reliable data retention methods cannot be ignored: Xiaomi’s ecosystem and Google’s services offer automatic synchronization, which makes physical copying to a SIM card plastic a thing of the past, and this is especially true when switching to a new smartphone.
Mi Cloud accounts allow you to save not only numbers, but also SMS, call history, notes and schedule. To activate, go to Settings → Mi Account → Sync and make sure the switch opposite Contacts is activated. Data will instantly fly to the cloud and be available from any device after login.
- ☁️ Sync with Google Contacts – automatically saves each new number.
- 📲 Mi Mover – an application for fast transfer of all data to the new Xiaomi over Wi-Fi.
- 💾 Export to.vcf – creating a backup file in internal memory or on a flash drive.
Using a.vcf file is a good medium: You can export all contacts to one file through the Import/Export menu and save it to your computer or send it to your messenger. This file can be opened on any phone, and all contacts (including photos and email) will be restored to full, unlike a limited SIM card.
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Cloud synchronization is more reliable than physical SIM-card, as it protects data even in case of loss or breakage of the device and SIM card.
Solving common export problems
During the transfer process, users may encounter errors, one of the most common is the message “Not enough space” or “Write error”, which can mean both a real card overcrowding and a logical error in the SIM file system, in the first case, you need to delete old unnecessary numbers directly from the SIM.
If the card is empty but the error persists, try restarting the smartphone. Sometimes the Xiaomi communication module loses correct contact with the card chip after a long time, also helps to extract the SIM card, wipe the contacts with a lastiche and re-install. Make sure that the card is inserted correctly, according to the circuit in the tray.
Sometimes the system says, "Contacts are copied," but the phone book doesn't have any, so you need to check the display filter, and by default, the phone can only show contacts from your Google account, hiding those on the SIM card, go to the display settings and select "All contacts," or «SIM-map».
⚠️ Attention: If you try to copy the phone freezes or spontaneously restarts, you may have damaged the SIM file system. Don't try to copy the data forcefully many times - this can permanently disable the chip.
In rare cases, the problem is in the application's permissions. Go to Settings → Applications → All Apps → Contacts → Access rights and make sure that phone and contacts are allowed. Without this, the system application will not be able to read the data to be transmitted.