Changing your smartphone or a sudden operating system failure are often the reasons why Xiaomi users think about the reliability of their data storage. Contact records are one of the most valuable categories of information, the loss of which can paralyze business and personal life. Device owners often look for a way to transfer numbers from their phone to a SIM card to protect themselves from unforeseen circumstances.
The MIUI and HyperOS ecosystem offer flexible address book management tools that allow data to migrate easily between internal memory, the cloud, and the physical medium. However, the transfer process has its own nuances, which depend on the firmware version and the device model. Understanding these mechanisms will help avoid duplication of records or loss of important details, such as additional numbers or email addresses.
In this guide, we will take a closer look at data copying algorithms, look at the differences between storage formats, and answer frequent questions users have. SIM-The card has a limit on the number of characters in the name, and how to properly prepare the phone book before you migrate.
Preparation for data portability and format verification
Before you start moving records, you need to make sure that the original data is in the correct state. Often users store numbers in different places: part in Google Contacts, part in the device memory, and some old records can remain on SIM. To successfully import to the SIM card, all numbers must be collected in a single storage of the phone.
Check if any contact groups are hidden. In the standard Contacts app from Xiaomi or Google, you can configure only certain sources to display. If you don't see the desired number in the shared list, it won't get into the file to transfer. Make sure you select the option to display all available sources.
It is also worth paying attention to the format of names. SIM-The cards have strict limits on the length of the contact name (usually up to the end of the contact date). 15-20 characters) and do not support the retention of additional fields such as email, address or second phone number, when long names are transferred, they will be cropped and excess information deleted without the possibility of recovery.
- 📱 Make sure that SIM-The card is correctly installed in the tray and is determined by the system.
- ☁️ Check if you have a backup in the cloud in case of an unexpected crash.
- 🔋 Charge the device to at least 40% so that the process is not interrupted due to discharge.
- 📶 Make sure the network connection is stable if you need to synchronize before copying.
⚠️ Note: When copying the SIM-All unique fields, except the main number and name, will be permanently lost.
Import contacts from Google Account to phone memory
Modern Xiaomi smartphones sync data with a Google account by default, which is a convenient way to store, but to write to a SIM card, numbers must be physically stored in the device’s memory. The first step is to import from the Google cloud to the phone’s local storage.
Open the Contacts app and go to the Contact Management settings, where you will need to find the import/export point, select the source of Google and the target storage of Phone, and the system will request confirmation of action, as it can create duplicates if the numbers already exist locally.
Once the synchronization process is complete, all the records from the cloud will appear in the smartphone's memory, and they are now ready for further processing. SIM-portability MIUI Often unavailable or incorrectly functioning.
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Use the web version of Google Contacts to quickly clear duplicates before importing them onto your phone. SIM-map.
If you have Google Contacts installed separately from the system, the process may be slightly different, in which case you need to go to the settings of the Xiaomi system application to see the options for working with the system. SIM-maps that are often hidden in third-party address book launchers.
Step-by-step: copying numbers to SIM in MIUI
The main transfer process is through the built-in Contacts app, and the interface may vary slightly depending on the version of MIUI or HyperOS, but the logic remains the same. You need to access the data management menu.
To start, open the app and click on the three dots or menu icon in the corner of the screen. Select "Import/Export Contacts." In the action list that opens, find the option "Export to" SIM-map or "copy on" SIM-The system will warn you that some data may be lost due to format limitations.
Then you should select the source of contacts. If you did the previous step, select "Phone" or "Device." If the numbers are stored elsewhere, select the appropriate acca. After selecting the source, the system will suggest marking the contacts for transfer. You can choose "All" or manually mark the required records.
☑️ Checklist before export
Press the confirmation button and wait until the process is complete. The waiting time depends on the number of records. It is not recommended to interrupt the operation or switch to other heavy applications so as not to cause a failure in the communication module.
Working with two SIM-maps: nuances of choice
Xiaomi smartphone owners often use two active numbers. When transferring contacts, it is important to understand which card is being recorded on. Unlike some older phone models, modern Android devices allow you to choose the target. SIM-contact-card.
When you start the export procedure, the system can automatically suggest that you select a slot if you have two cards installed in the phone. If you do not have a choice, the default entry goes to the main SIM (usually SIM 1). To transfer the numbers to the second card, you may need to temporarily disable the first in the settings or physically remove it.
Storage limits are also individual for each card. SIM-The cards can hold 250 records, while new ones can hold 500 or more. If you try to write more numbers than the storage capacity allows, the process will stop, and some of the data will not be saved.
| Parameter | SIM 1 (Main) | SIM 2 (Additional) | Phone memory |
|---|---|---|---|
| Capacity | 250-500 contacts | 250-500 contacts | Depends on free memory. |
| Length of name | Up to 15-20 characters | Up to 15-20 characters | No restrictions. |
| Supplementary fields | Not supported. | Not supported. | All supported |
| Speed of access | Low. | Low. | Tall. |
⚠️ Attention: When using two SIM-Pay close attention to the choice of the target medium, so as not to write important work numbers on a personal card or vice versa.
Alternative methods and use of vCard
If the standard method through the phone menu for some reason does not work or seems inconvenient, you can use the intermediate format vCard (.vcf). POCO.
The essence of the method is to export all contacts to one file, save it in the device memory, and then import this file with the choice of the target storage «SIM-However, it is worth noting that direct import from the.vcf file is directly to the SIM-The card is not supported by all firmware versions, and often the file is imported into the phone's memory, from where it already needs to be copied to the SIM in the way described above.
However, backing up vCard is a great practice. You can save this file to your computer or send it to your messenger. If you lose your data, you can always restore it, even if you don't have a file. SIM-The card will be lost or damaged.
Why is vCard better than direct copying?
Solving problems and errors during transfer
Users may experience various errors in the migration process, such as a phone that can send a message «SIM-The map is crowded, even if you copy a few numbers, and this is often because the map already has old contacts that take up space, and you have to delete them beforehand.
Another common problem is name encoding, where Cyrillic names can become a collection of obscure characters or question marks after transfer, due to the difference in encoding standards between the Android operating system and the chip. SIM-Unfortunately, it's hard to fix this after the fact, so it's better to check the results selectively.
If the export button is inactive (gray), check if the contact read-only mode is on or if there are any problems with the application's access rights, sometimes simply restarting the device before starting the procedure helps.
- 🔄 Restart your smartphone if the interface is slow to react.
- 🗑️ Clear the cache of the “Contacts” application in the application settings.
- 📵 Make sure that SIM-card not blocked PIN-code-in.
- 📂 Check if you are not overcrowded. SIM-map.
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The most reliable way to avoid encoding errors and data loss is to keep contacts in a Google Account with regular sync, using SIM only as an emergency medium.