Changing mobile devices or having to restore access to numbers after a system reset often puts the user in the position of saving the phone book. Owners of Xiaomi, Redmi and Poco smartphones may face a situation where all records are stored in the cloud or internal memory, and to work requires their physical placement on the operator’s chip, this is especially true when switching to a button phone or using a device without a Google account.
The data transfer process does not require root rights or complex software, but it has its own technical nuances that need to be considered. The standard MIUI or HyperOS shell provides built-in tools for managing records, allowing you to flexibly configure storage sources. Understanding the logic of the address book will help avoid losing important information during the migration process.
In this tutorial, we will discuss in detail the algorithm for safe copying of numbers, consider possible errors and how to fix them. You will learn how to properly prepare a subscriber list, what data formats are supported and why some fields may be lost when transferring to SIM. Following the recommendations ensures the safety of your data.
Preparation of the telephone book and check of restrictions
Before you move your phone book directly, you need to do a check on the current status of your phone book, and users often don't realize that their contacts are scattered across different accounts, like Google, Xiaomi Cloud, local phone storage, or even instant messengers like Viber and Telegram. To export successfully, all the numbers you need must be in a single source, accessible to system tools.
Open the standard Contacts app and go to the display settings. Make sure you select the viewing mode of all available sources. If you see records with a human icon or Google logo, they will need to be pre-copyed into the phone's memory, since direct export from the cloud to SIM is often unavailable or limited by the firmware functionality.
⚠️ Attention: Memory limit SIM-The card is extremely small, and it's usually 250 to 500 records, and it only saves a name and a phone number, and all the extra data, like addresses, emails, photos and second numbers, will be permanently deleted when you copy it.
It's also important to check the format of names. SIM-It is recommended to reduce long company names or compound names to an understandable minimum in advance so that they read correctly on the screen of an old phone or on the subscriber list.
Algorithm of transferring contacts through a standard application
The main method of importing and exporting data is implemented directly in the standard Contacts app, which is preinstalled on all Xiaomi devices. The interface may vary slightly depending on the version of MIUI, but the logic of actions remains the same. To begin, open the application and find the menu button, which is usually represented by three dots in the upper right or lower corner of the screen.
In the list that opens, select "Import/Export contacts" and the system will offer several options. SIM-map or "copy on" SIM-When you select this action, the phone will automatically analyze the list of available numbers and prompt you to select the ones you want to move. You can mark individual records or use the "Select all" function».
☑️ Checklist before copying
Once the selection is confirmed, the copying process will begin, during which time it is not recommended to interrupt the application or block the screen, although modern Android file systems are quite resistant to interruptions. Upon completion of the operation, you will receive a notification of successful export or error message if some records could not be placed due to technical limitations of the format.
It's worth noting that the process can take time if you copy a few hundred numbers, and at this time, the device may get slightly warm, which is a normal processor reaction to active recording operations. After completion, be sure to check the result by switching the display of contacts only to SIM-map to verify the integrity of the data.
What to do if the export button is inactive?
Use Google Contacts for Synchronization
An alternative and often more reliable way to manage a phone book is to use a web interface or a separate Google Contacts app.This method is especially useful if the Xiaomi built-in app is unstable or if complex data filtering is required before transfer.
To start, make sure your phone’s settings are synchronized. Go to Settings → Accounts and Sync → Google and make sure the slider opposite Contacts is active. Then open the Google Contacts app (a separate icon with a colored man) or the web version of the service via your browser.
In the Google Contacts app, go to the management menu and select Sync Settings, where you can choose which groups or accounts to display and sync. If your records are in Xiaomi Cloud or elsewhere, import them to your Google account first through the Import feature (select.vcf file), and then export to SIM through the app menu.
The advantage of using the Google ecosystem is that it can be edited massively, so you can remove duplicates, combine cards with the same names, and format numbers in an international format before sending them to the map, which reduces the risk of errors and confusion when you continue to use the phone book on other devices.
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Use the “Combine and Fix” feature in Google Contacts before exporting to remove duplicate entries and save precious space on your website. SIM-map.
Working with VCF backup files
The.vcf (vCard) format is a universal standard for sharing contact information, and allows you to keep a complete recording structure, including multiple numbers, photos and addresses, in a single file. SIM-The card does not support this format directly, using an intermediate.vcf file is the best way to transfer data between different phones if direct export is impossible or inconvenient.
To create a backup, open the Contacts app, click on the three-dot menu, and select Import/Export Contacts. In the window that appears, click Export to Storage or Export to.vcf. The system will prompt you to choose a save path, usually internal memory in the MIUI/backup/contacts folder or root directory.
The resulting file can be transferred to another phone via Bluetooth, Wi-Fi Direct (using the app). MI Drop or ShareMe) or just save to the cloud. On a new device, just open the file and the system will suggest importing the records contained in it. SIM-map.
However, if the ultimate goal is SIM-If you import a.vcf file to a new device (or a current phone after a reset), you will get a full phone book in the device's memory. From there, as described in the previous sections, you can copy to the operator's chip, pre-filtering the most important numbers.
Solving common export problems
The data transfer process is not always smooth and users may encounter various errors. One of the most common problems is the message "Memory" SIM-This occurs when the number of selected contacts exceeds the physical capacity of the chip, in which case you need to manually select fewer numbers or delete old unnecessary entries directly from the card.
Another common situation is code distortion, where names written in Cyrillic can turn into a set of obscure characters or question marks, due to differences in encoding tables between the Android operating system and the firmware. SIM-Unfortunately, it's almost impossible to fix this software at the phone level, because the limitation is in the chip's standard.
| Problem. | Probable cause | Decision-making |
|---|---|---|
| Contacts are not copied | No permission for the application | Check the rights in Settings → Applications |
| Names are displayed by the Cracosabras | Incompatibility of encoding | Rename contacts Latin |
| Only one number is retained. | Limitation of the SIM format | Take for granted, store complete data in the cloud |
| The "Not enough memory" error | Chip overflow | Delete old SIM entries through the Contact Menu |
It can also be a situation when the numbers are displayed without the country code or, conversely, with extra numbers. SIM format often requires strict adherence to input masks. It is recommended to bring all numbers to a single international format (starting with +7 or 8) before the export procedure to avoid problems with the number determinant in the future.
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A SIM card is an outdated medium for large amounts of data, use it only for the most important numbers, and keep the main database in the Google or Xiaomi cloud.
Removing duplicates and cleaning the phone book
When you change devices frequently or sync with different accounts, the phone book becomes duplicated. The same subscriber can be listed three times from your mobile, home and work number, in different recording formats. Before transferring to SIM, it is critical to clean, otherwise you will spend limited memory of the chip on repeating records.
The MIUI shell has a built-in tool to merge duplicates. Open the Contacts app, click on the menu and select Cleanup Duplicates or Combine Repeated Contacts. The system will prompt you to automatically find matches by name or number and combine them into one card. Carefully check the result so you do not lose unique numbers (for example, if a person has changed number, and you combine the old and new entry).
After automatic cleaning, it is useful to conduct a manual audit. Go through the list and delete contacts marked "No Name" or those you will not use. Remember that every entry on the SIM takes up space, and "junk" contacts can place to save really important numbers of emergency services or close relatives.
If you plan to sell your phone or put it in repairs, cleaning your phone book and moving data to SIM or the cloud is a must-have to protect your personal information. Remember that even after you delete it, data can be recovered using special methods, so using SIM as a temporary buffer when resetting is a smart security strategy.
⚠️ Note: When removing contacts from SIM-The cards are erased permanently through the phone menu and don't get into the cart. You can't restore them without a backup.