Switching to a new smartphone or a sudden system failure often puts the user in need of a quick transfer of the phone book. Owners of Xiaomi, Redmi and Poco devices often look for a way to copy numbers to the physical. SIM-It's the most reliable and versatile method, and indeed, storing data on an operator's chip allows you to instantly activate a number in any phone, even a button phone, without having to log in to cloud services.
But the current Android ecosystem, which runs MIUI or HyperOS, has its own touch memory features, and standard tools often hide the direct export function, and sometimes even block it if the numbers contain advanced information, and you'll have to understand the nuances of storage formats to avoid losing important data when you transfer it.
In this article, we will take a closer look at all the ways that records can be moved, explain the limitations, and suggest the most effective alternatives, and learn how to bypass system locks and ensure that you keep your data when you change devices.
Restrictions on the SIM-card storage format
Before you start transferring, it's important to understand the technical side of the process. SIM-The card is extremely limited compared to the internal memory of a smartphone or cloud storage. Standard chip is able to store only basic information: the name of the subscriber and one phone number.
If your contacts on your phone contain additional fields, such as a second number, email, address, job title or photo, when exported to a SIM card, this information will be irretrievably lost.
⚠️ Warning: Before mass export, be sure to back up your current phone book. SIM Original records with advanced data can be overwritten with simplified versions.
There is also a limit on the length of the contact name, which is usually 10-15 characters depending on the encoding, and long names will be cropped, which can make it difficult to identify the subscriber in the list.
- 📉 Record limit: old SIM cards can accommodate up to 250 contacts, new ones up to 500.
- ✂️ Data cropping: all fields except name and number are deleted.
- 🔤 Encoding: possible problems with the selection of Cyrillic on some devices.
Why are modern smartphones discouraged from storing on SIM?
Preparation of the device and check of contacts
The export procedure requires prior preparation. SIM-The card is correctly installed in the slot and is determined by the system. If you use a dual-sim device, select the card you plan to write the numbers to.
Open the standard Contacts or Phone app and go to Contact Management. The path may vary slightly from MIUI to version, but the logic remains the same. You need to find the menu responsible for importing and exporting data.
☑️ Preparation for transfer
Often, users are faced with a situation where the export button is inactive, which occurs if the contacts are stored directly in the Google account, not in the phone memory, in which case you first need to copy them to the internal memory of the device.
To do this, select all contacts, select the option “Copy” or “Move” and specify the target device “Phone” or “Device”, only after that they will be available for writing to the SIM card.
Classic method through the Contacts app
The most common way to transfer data is through the built-in contact management menu, which works on most Xiaomi models with Android version up to 11 inclusive, as well as on some newer firmware where the manufacturer left this feature.
Go to the Contacts app and click on the three dots in the corner of the screen or menu button. Select Import/Export contacts. In the action list that opens, you will need to find the Export option on the website. SIM-map.
| Action. | Description | The result |
|---|---|---|
| Select the source | Specify "Phone" | The system will see local numbers |
| Select a recipient | Indicate «SIM-map» | The copying process will begin. |
| Confirmation | Press "OK" or "Yes" | Records will appear on the chip |
| Verification | Remove the SIM and paste it into another phone | The data should be displayed. |
If there is no menu item "Export to the SIM», Try to select Export to Storage (created file.vcf), and then select Import from Storage in the same menu and specify SIM-This is a workaround that often works.
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If the item “Export to the SIM-The card is missing or blocked, so your Android version or shell is not available. MIUI software-limiting this function, in which case use the alternative methods described below.
Use Google Contacts for Synchronization
The most reliable and modern way to migrate data is to use Google’s cloud service, which does not require a physical transfer to the SIM card, since it allows you to instantly restore all the numbers on the new device when you log in to your account.
However, if your goal is to record on SIM (for example, for an old phone without internet), you can use Google Contacts as an intermediary: go to contacts.google.com from your computer, export contacts in vCard (for iOS) or CSV (for Google), and then import them back by selecting the save option on SIM if the phone allows.
In the smartphone itself, this process looks like this:
- ☁️ Open the Settings. → Accounts and synchronization.
- 🔄 Select your Google account and enable contact sync.
- 📥 After downloading, open Contacts. → menu → Imports/Exports.
It’s important to note here that direct cloud-to-SIM writing is often not available, and you still have to download contacts to your phone’s memory first and send them to your SIM card in the classic way.
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Use the Restore Contacts feature in Google’s Contacts app on your new phone, which will save all the history, photos and additional fields that will inevitably be lost when you write to the phone. SIM-map.
Solving the problem: when the export button is inactive
Xiaomi users with MIUI 12, 13, 14 and HyperOS shells often face a complete lack of export feature on SIM.This is not a bug, but a conscious decision of Android developers who consider storing contacts on a SIM card outdated and unsafe.
In such cases, you can't do it with standard system tools. You'll need third-party software. There are many converter applications in the Play Market store, such as SIM Manager or Copy My Data.
⚠️ Warning: Be careful when installing third-party contact apps, only give them access to the phone book, not to the phone book. SMS location, unless it is necessary to do so.
Once you install this application, run a scan. The program will show the difference between contacts in the phone's memory and those in the phone's memory. SIM-Select the Copy to option. SIM or write to SIM. The process may take time, don’t interrupt it.
Some users try to use the engineering menu to access hidden features, but for normal contacts export, this is redundant and can be dangerous.
Alternative ways to save data
Given the limitations SIM-So, if you look at the maps, you might want to consider alternative methods (backups) that store all the contact information, and the first and best option is to export to a.vcf file to a memory card or to the cloud.
The vCard file (.vcf) contains all the information: names, numbers, addresses, photos, can be sent to yourself by email, saved to a messenger or a USB drive, and can be imported into any phone, regardless of the operating system, if necessary.
Another option is to use the MI Mover app (or its analogues), which transfers all data from the old Xiaomi to the new one over Wi-Fi, which is faster and more reliable than messing with a SIM card.
- 💾 File. VCF: 100% data is easily transmitted.
- 📱 MI Mover: Ideal for switching between Xiaomi smartphones.
- 🌐 Google Sync: Automatic Real-time Update.
If you still need to use SIM-card as a single medium (for example, to transfer data to a button phone), then after export, be sure to check several random numbers.