Changing your smartphone or having to use an old model to make calls often puts the owner in the task of saving the phone book.In the MIUI ecosystem installed on Xiaomi devices, this process has its own features that distinguish it from standard Android. Users often confuse saving to the Google cloud with physically writing to the card chip, which can lead to unexpected data loss when formatting.
Transfer of records directly to SIM-The card is a reliable, albeit somewhat outdated, backup method, and the main advantage of this approach is its versatility: contacts will be available on any phone, even if it is not connected to the Internet or does not have a Google account. However, it is worth remembering the technical limitations of the carrier.
In this article, we will take a detailed look at the algorithm for different shell versions, explain why some fields may disappear, and provide alternative, more modern synchronization methods. The maximum length of a name when saved on SIM is 14-16 characters, the rest will be cut automatically, careful study of the instructions will help avoid common errors and save important connections.
Technical limitations and preparation for transfer
Before we start copying, we need to understand the physical limitations of the host. SIM-The card has a very small amount of memory, designed primarily to identify the subscriber in the network, rather than storing multimedia or large databases. Standard capacity allows you to save from 200 to 500 records, depending on the operator and type of card.
Modern Xiaomi smartphones store contacts in the vCard format, which supports many fields: multiple numbers, email, address, job title, photo and social networks. When exported to SIM, conversion occurs, during which only the name and one main phone number remain compatible, all other information will be irretrievably lost.
To successfully perform the operation, make sure that SIM-The card is correctly installed in the slot and is determined by the system. If you use a dual-sim device, the system will suggest choosing which card to write data to. It is also recommended to check the free space on the chip, although modern cards usually have a sufficient reserve.
⚠️ Note: Before starting mass copying, it is strongly recommended to make a backup copy to Google Contacts or Mi Cloud, this will allow you to restore the data to its original form if the writing process is not used. SIM will pass.
The preparation process also includes checking the format of the numbers, and make sure that your phone book has the numbers in an international format or with the city code, as the number is in the phone book. SIM-map they can be displayed differently, which will create difficulties when dialing from other devices.
Step-by-step export through the standard Contacts app
The main and most correct way to transfer data on Xiaomi devices is built into the standard Contacts app. The interface may vary slightly depending on the version of MIUI or HyperOS, but the logic of actions remains the same for all models, whether it is a budget Redmi or flagship Mi.
To start, open the Contacts app on your desktop or in the Tools folder. In the upper right corner of the screen, you will see a menu icon (three dots or three horizontal bars). Clicking on this item opens the list of available actions where we are interested in the item "Import and export contacts".
☑️ Export algorithm for SIM
In the menu, select the option “Export to” SIM-The system will automatically scan the database and show you the list of contacts available for transfer, you can select individual records by ticking them, or use the "Select All" function if you plan to move the entire book.
Once you select, click Export or Copy, and the system will alert you that some of the data (photos, additional numbers) will be deleted, confirm the action, and the recording process will begin. The speed depends on the number of records, but usually takes no more than a few seconds for every 10-20 contacts.
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If the button "Export to" SIM-The card is inactive (gray), so the card has run out of free memory or does not support recording contacts.
Alternative method through system settings
Sometimes, a standard contact app may not work properly or be available, and in such cases, you can use Android system settings that duplicate account and data management features, a technique that is especially useful if the MIUI interface has been heavily modified or simplified.
Go to the main Settings menu of your smartphone. In the list, find the Apps or System Apps section. Inside this section, you need to find Contacts or Contact Management. The path can vary: Settings → Apps → Contacts.
Inside the contact management menu, look for the Import and Export section, where the functionality is completely identical to that described in the previous section, but accessed through the system menu, bypassing the graphical shell of the application. SIM-Map and follow the instructions on the screen.
This method also allows you to manage the contacts stored on the SIM-You can select the option "Import with the map". SIM-Maps" to return saved numbers back to your phone's memory or Google account.This is handy when you initially set up a new Xiaomi device after an old button phone.
Working with Google Contacts and Synchronization
Although the question was about the transfer to SIM, You can't ignore the power of cloud synchronization, and Google's ecosystem provides a more reliable and functional way to store numbers. SIM-The cloud has no limit on the number of characters in the name or the number of additional fields.
To make sure your contacts are saved to Google, open the Contacts app, click on the menu and select Settings. Under Account to Sync or Google Contacts, make sure the switch is active. All new default numbers will be saved there.
The advantage of using a Google Account is that you can manage your contacts through a web interface on your computer, so you can edit names, combine duplicates, and recover deleted records in the last 30 days, which is much more convenient than manipulating a physical card.
If you want to transfer data from Google to SIM (For example, for use in a button phone, you can select all contacts in the app, click on the menu and select Share or Export, and then specify SIM-The system will perform the required format conversions.
Comparison of data storage methods
Understanding the differences between storage methods will help you choose the best option for your situation. Below is a table comparing the main characteristics of storing contacts on your site. SIM-map, in phone memory and in cloud services.
| Characteristics | SIM-map | Phone memory | Google / Mi Cloud |
|---|---|---|---|
| Capacity | 200-500 records | Depends on memory. | No restrictions. |
| Length of name | Up to 16 characters | No restrictions. | No restrictions. |
| Photo of contact | Not supported | Supported | Supported |
| Additional numbers | Only 1 room. | Lots of rooms. | Lots of rooms. |
| Availability | On any phone. | Only on this device. | With the Internet. |
The table shows that SIM-The card loses in functionality, but it gains in universality of access, if you just need to have a basic list of numbers for emergency calls or on a temporary device, SIM — For everyday use of the smartphone Xiaomi should give priority to cloud technology.
The phone's memory is an intermediate link. Contacts stored locally ("On the phone") are not automatically synchronized. When you reset or break your device, this data will be lost unless you make a separate export.
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The best strategy is to keep the main base in Google Contacts for synchronization, and on the Internet. SIM-Copy only the most important numbers (relatives, emergency services) in case of loss of access to the account.
Solving common export problems
Users often experience a situation where the copying process is interrupted or the export button is inactive. One of the common reasons is the format of the number storage. If the contact is saved as "Viber", "WhatsApp" or in the messenger, the system may not allow it to be copied to SIM, since this is not a full-fledged telephone contact.
The other problem is that the card is overflowing, and even if you see the slots that are free, the technical limit can be reached, and then the system will give you an error. SIM-cards from old unnecessary entries through the menu "Import with" SIM-map» -> «Delete».
What if the names are cut to one symbol?
Also worth mentioning is the problem of duplicates: multiple exports and imports on one of them. SIM-The map can appear copies of the same numbers. Xiaomi has a built-in tool for combining duplicates, which can be found in the contact menu under the item “Clean” or “Contact Management».
⚠️ Attention: Don't pull out SIM-While modern cards are protected from static electricity, interrupting the writing process can damage the chip's file system, and the card will have to be formatted.