Owners of Xiaomi Redmi smartphones 9T They often have to move the phone book when changing devices or creating backups. Despite the ubiquitous use of cloud services and Google accounts, a method of storing data directly on a physical medium is a method of saving data — SIM-This is a card that is relevant and in demand, and it allows you to have independence from the Internet connection, and you can quickly transfer the number base to any other phone, even a button.
The MIUI data migration process on the Redmi 9T has its own characteristics that distinguish it from standard Android. The security system and contact logic are designed to minimize the risk of information loss, but sometimes it creates difficulties for the user. Understanding how to organize exports correctly will help to avoid situations where numbers are lost or duplicated.
In this guide, we will take a detailed look at the algorithm, the settings needed, and the pitfalls that can be encountered, how to optimize the subscriber list before transferring, and what to do if the standard methods fail. Maximum capacity SIM-The card is usually limited to 250 entries, so pre-filtering of long names is mandatory.
Preparation of the telephone book for export
Before starting the transfer procedure, it is critical to put the contact list in order. Often users store numbers in different sources: in the phone memory, on Google account, in the Viber app or WhatsApp. To successfully export to the SIM card, all records must be combined into a single storage "Phone" or "Device".
Open the standard Contacts app and go to settings. Find the take-unification function. MIUI offers automatic retrieval of duplicate records, which makes it much easier. If you don't, you run the risk of multiple identical numbers with different names coming out, which will take up precious space on the media.
Pay attention to the length of the names. SIM-The card has strict limits not only on the number but also on the amount of data in a single cell. Long names containing emoji or special characters can be cropped or cause an error in writing. 15-20 symbolism.
- 📱 Check where each number is saved (Google, SIM, Phone).
- 🧹 Remove clearly unnecessary or outdated records to vacate space.
- ✂️ Shorten the long names, leaving only the essence (Name) + First letter of the surname).
- 🔍 Use the “Combine Duplicates” function in the Contact Settings menu.
Algorithm of transferring contacts to SIM-map
The immediate copying process in Xiaomi Redmi 9T is done through the built-in control menu. It is important to act consistently so that the system correctly handles the request for a write. First, make sure that the SIM card is properly installed and determined by the system.
Go to the Contacts app and click on the three dots in the top corner of the screen (menu). Select "Import and Export Contacts." In the action list that opens, you are interested in the option "Export on the menu". SIM-The system may request confirmation of source selection if you have multiple numbers.
☑️ Checklist before export
Once you have selected a source (usually a Phone or a Device), the system will suggest you select all the contacts or mark them manually. With a large number of records, it is more convenient to use the Select All function, and then uncheck the ones that do not need to be carried. Press Export or Copy.
The process can take anywhere from a few seconds to a minute, depending on the amount of data, at which time it is not recommended to switch between applications or block the screen, and at the end of the operation you will receive a notification of successful copying or an error report if any records were not saved.
⚠️ Note: Do not remove the tray during the export process. SIM-This can damage the media file system and lose all data that has already been written.
Dealing with Data Limitations and Formats
Redmi 9T users should be aware of the technical limitations of the storage format on SIM chips. It is not a full-fledged flash memory, but a specialized module with a simple file system. It is not designed to store multimedia or complex data structures.
The main limitation is the number format. On a SIM card, the phone number is usually stored in an international format, but without additional characters such as brackets, dashes or spaces «+7 (999) 000-00-00», When exported, it will be converted to «79990000000». This is normal and necessary for compatibility.
Also consider the limit on the number of numbers per contact. SIM-The card often only supports one phone number per record, and if a contact has three different numbers on their phone (mobile, work, home), only the first or primary number will likely get on the SIM card.
| Parameter | Phone Memory / Google | SIM-map | Note |
|---|---|---|---|
| Number of numbers per contact | Unlimitedly. | Usually 1. | Additional rooms may be cut off |
| Length of name | Up to 100+ characters | ~15-20 characters | Long names will be cut off |
| Photo preservation | Yes. | No. | Images are not portable |
| Email and addresses | Yes. | No. | Additional fields are ignored |
Why are some contacts not copied?
Solving common export problems
Despite the simplicity of the procedure, there are sometimes crashes, and Xiaomi users are more likely to experience a situation where the export button is inactive or the process is interrupted with an error, which can be caused by a software conflict or damage to the index table of contacts.
One of the common causes is a crowded memory. SIM-If you've used this card on another phone before, you might have left some old records. Go to the contact settings and select "Show contacts from the contact settings." SIM-Remove all the extra to make room for new records.
Another problem is that name encoding is incompatible. Cyrillic names can sometimes be displayed by cracosyabras on older phones, although modern Android smartphones, including Redmi 9T, usually handle UTF-8 correctly. If the names have turned into a set of characters after the transfer, try renaming the problematic contacts using only the Latin alphabet, and repeat the export.
- 🔄 Restart your smartphone before trying to export again.
- 🗑️ Clear the Contacts app cache through the application settings.
- 📉 Try exporting contacts in small groups (50 pieces each).
- 📞 Make sure that SIM-The card is not physically damaged.
⚠️ Note: If the system says that "Memory" SIM-The cards are full, don’t try.-force Delete some of the old records directly from the SIM card through the contact management menu, selecting the source itself. SIM.
Alternative backup methods
Keeping contacts exclusively on SIM-The 2026 map is considered a less reliable method compared to cloud technology. - Xiaomi Redmi 9T It is worth considering more modern ways to save the phone book, which have no restrictions on the volume and format of data.
Sync with your Google account is the most convenient way. Your contacts are automatically saved to the cloud and accessible from any device that logs in to that account. To enable this feature, go to Settings → Accounts and Sync → Google and make sure that the Contacts switch is active.
You can also use the Mi Cloud, which is deeply integrated into MIUI, and allows you to restore contacts even without access to the Internet at the time of reset (if you have pre-sync), backup files can be exported in.vcf format and stored on a computer or flash drive.
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Expert advice: Create a local backup in.vcf once a month and save the file to the cloud (Google Drive, Yandex.Disk) to protect you from random synchronization with an empty contact list.
To create a.vcf file, manually use the Contact Import and Export menu and select Export to Device Memory or Export to Internal Storage. The resulting file can be sent to yourself by mail or saved to an external medium, the most complete way to save all fields, photos and additional numbers.
Re-establishment of contacts with SIM-map
After a successful export or when buying a new phone, the reverse task is to import data. 9T This process is automated, and when you first set it up, the phone will prompt you to copy the contacts from the phone. SIM-If you missed this step, you can do it manually.
Go to the Contacts app, open the menu and select Import with SIM-The system will suggest you choose destination — where to save the numbers. The best way to choose a Google account or phone memory, as this will provide better compatibility and the ability to further synchronize.
Once you've selected the target storage, you'll start copying. Unlike export, importing faster. Once you've finished, check the list: make sure all numbers are displayed correctly and names aren't cropped. If you've imported data into your phone's memory, remember to enable sync so you don't lose them in case your phone breaks.