Changing your mobile device or resetting your settings to factory settings often raises questions about the safety of your personal information, and the most valuable data on your phone is traditionally the phone numbers stored in your phone book. In modern realities, cloud services offer automatic synchronization, but a physical medium such as: SIM-The card remains a reliable way of booking, independent of the Internet or the status of the Google account.
The MIUI operating system installed on Xiaomi devices has its own features in the organization of work with contacts, other than pure Android. Users often face the fact that standard menus are hidden or renamed, which causes difficulties when trying to export data. In this article, we will discuss in detail the algorithm of actions that will allow you to safely move records from the device to the chip carrier, retaining important connections even when the system is completely reinstalled.
Bear in mind that the transfer process has its own technical limitations, which you need to know in advance. Operator cards have a small amount of memory and a specific structure of storage fields, so not all information can be copied in full.
Limitations and features of data storage on SIM
Before embarking on active export action, it is important to understand the physical limitations of the carrier you are working with. SIM-The Subscriber Identity Module was originally designed to identify a subscriber on the network, not to store multimedia content or extensive databases. Its internal memory is extremely limited compared to modern flash drives smartphones, which dictates its rules for working with the phone book.
The main limitation is the length of the records and the number of characters in the name. If you could save a contact name of 50 or more characters in your phone's memory using spaces and special signs, the operator chip often trims the name to 10-15 characters. In addition, the storage structure on the SIM does not allow you to store additional fields such as email, address, title or a second phone number for a single record.
- 📉 Memory: A standard card can hold 250 to 500 records, after which the system will issue an overflow error.
- 🔤 Encoding: There may be problems with displaying Cyrillic on older models of cards or when transferring to devices from other manufacturers.
- 📞 One field: Only one number is written to a single memory cell, even if the contact has several.
⚠️ Note: When copying contacts with extended names on Xiaomi, you can automatically truncate text. It is recommended to check critical contacts in advance and, if necessary, reduce names manually so as not to lose subscriber identification.
Another feature is the number saving format: some old cards can save the number in an international format, others in a local one, which sometimes leads to duplicate records or problems with determining the Caller ID. Understanding these nuances will help you avoid chaos in the phone book after re-importing data to a new phone.
Preparation of the device and compatibility check
The procedure for transferring contacts to Xiaomi requires preliminary preparation of not only the software part, but also physical interaction with the device. SIM-a card that is scheduled to be recorded on two-slot models (Dual) SIM) The system will always suggest selecting the target card, and a selection error will result in the data being written to an unnecessary chip.
Before mass export, it is recommended to check the status of the card itself, if it has been used for several years and has been repeatedly cut into the Nano-SIM format, the contacts on it may be damaged or read with errors, in which case the phone may hang for a long time during the "copying" stage, and then give a message about the failure.
It's also worth making sure that the contacts you're planning to move are actually in your phone or Google account memory, not already on the SIM. There's a display filter in the Contacts app on Xiaomi. If you see a SIM icon next to your name, then the record is already there, and there's no point in duplicating it. Our goal is to move the records with the Phone icon or the Google logo.
☑️ Preparation for the relocation of contacts
Step-by-step: export through the standard application
The most reliable and proven way to transfer data is to use the built-in functionality of the MIUI shell. The interface may vary slightly depending on the firmware version (Global, China, Russia), but the logic of actions remains the same. Open the standard Contacts app (usually an orange icon with a human silhouette).
In the list that opens, look for the management menu. In newer versions of MIUI, it's often the three dots in the top right corner or the Settings button at the bottom of the screen. You need to find a item called "Import and Export Contacts." That's where all the tools for working with the phonebook databases are hidden.
After entering the menu, select the Export option. SIM-The system will automatically analyze the number of records available for transfer, and if you have 1,000 contacts in your phone's memory and only 250 on the map, the smartphone will alert you to this and suggest you choose the records that you need to copy first.
What to do if the export button is inactive?
The copying process takes time proportional to the number of records. Don't interrupt the operation or turn off the screen, as in some versions of the firmware this can lead to a freeze in the synchronization process. Once completed, you will receive a report on the successful copy or a list of errors if any records could not be saved due to the format.
Alternative methods and use of Google Account
Although direct transfer to SIM-The card seems to be the easiest, and Xiaomi’s mobile experts often recommend using more modern and capacious redundancy methods. SIM card limits make it uncomfortable for large phone books, so using Google cloud storage or Mi Cloud is a more rational approach to data security.
If your goal is to just save contacts so you don't lose them when you flash them, you better sync them with your account. Go to Settings → Accounts and Sync → Google. Make sure the slider opposite Contacts is activated. This will allow you to restore the entire phone book with photos, emails and addresses on any new device in a couple of minutes.
| Parameter | SIM-map | Google Account | .vcf file (Memory) |
|---|---|---|---|
| Max, number of contacts. | ~250-500 | No restrictions. | Depends on memory. |
| Photo preservation | No. | Yes. | Yes. |
| Additional fields (Email, Address) | No. | Yes. | Yes. |
| Internet dependency | No. | Required. | No. |
However, if you still need to transfer contacts to a SIM, for example, to transfer to a button phone or a device without Android, you can use an intermediate file. Export contacts in.vcf format to internal memory, and then import to SIM through a file manager or third-party application.
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Use the.vcf format to create a full backup before any manipulations. This file can be saved to your computer or sent to your messenger, and it contains all the information without cropping names and losing fields.
Solving Common Problems in Transfer
Xiaomi smartphone owners may experience a situation where the copying process is completed by a mistake or some contacts simply disappear, one of the common reasons is the presence of special characters in the contact name or too long "Organization" field. The system tries to write all the data in strictly designated cells. SIM-cards and if you fail miss the record.
Another problem is duplicates, and if you've synced your phone with Google before and then decided to export to SIM, you may have dual entries, one from the cloud, another from the local one, and before exporting to the SIM, it's helpful to use the "Combine Duplicates" feature that's built into the MIUI contact management menu.
⚠️ Note: When transferring contacts from iPhone devices to Xiaomi and subsequent export to the company SIM There may be problems with the format of numbers (for example, the presence of a prefix). +7 instead of 8. Check the dial format in the call settings to ensure that the contacts are correctly identified.
If the phone says "SIM memory is full," even though you know there's plenty of room, try removing old, unnecessary entries directly from the SIM card. You can do this from the same import/export menu by selecting "SIM contact management." Cleaning up even 10-20 old numbers can make room for all current entries.
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Regular cleaning SIM-Maps from old records and using cloud sync as the primary storage method are the best strategy to prevent data loss.