Owning a modern smartphone Xiaomi Redmi Note 9 implies active use of cloud services, but the need to transfer the phone book to a physical medium has not disappeared. Often users are faced with a situation when you need to quickly transfer the database of numbers to an old button phone, transfer data to another person or simply back up in a format independent of the Google account. Owners of devices based on the MIUI shell are sometimes lost in numerous menus, since the logic of working with contacts here is different from pure Android.
The process of storing data directly to a SIM card chip has its own technical limitations, which you should know in advance. Unlike internal memory or cloud storage, a carrier card chip has an extremely small volume and outdated recording structure.
In this guide, we will take a detailed look at the Redmi Note 9, consider possible export errors, and suggest alternative options for storing important information. Understanding the way an address book works on Android will help you avoid data loss when you change your device or reset your settings to factory settings. We will also address the compatibility of formats and restrictions imposed by carriers.
Technical limitations of SIM card while maintaining numbers
Before you start transferring, you need to be aware of the physical limitations of the media. The standard SIM card (Subscriber Identity Module) was originally designed to authenticate the subscriber on the network, not to store large amounts of user data. That is why when you try to copy a modern phone book there, there are various nuances that can lead to trimming information or recording errors.
The main problem lies in the storage capacity and field structure. If your contact in Redmi Note 9 contains multiple numbers, email address, photo, social network link and detailed address of residence, when exporting to the SIM card, only the main part of the data will be retained. The rest of the information will be irretrievably deleted from the exported file, since the card file system does not support such advanced attributes.
⚠️ Note: When exporting contacts to the SIM card, all additional fields, such as second phone number, email, (notes) and avatars, will be lost.
There is also a limit on the length of the contact name. GSM Often limit the number of characters in a name (usually up to the 10-15 Long names, familiar to Xiaomi owners, can be cut beyond recognition, which will create confusion when used on another device. It is also important to consider that older cards can have a limit on the total number of records, often not exceeding the limit. 250 unit.
To understand the difference in storage capabilities, consider a comparative table of different media in the context of a phone book:
| Parameter | Internal Memory / Google Account | SIM card | VCF (Phone Memory) File |
|---|---|---|---|
| Number of fields | No restrictions (photo, email, address) | Name and 1 number only | No restrictions. |
| Length of name | Up to 100+ characters | Usually up to 15 characters | Up to 100+ characters |
| Limit of records | Depends on the disk space. | 250-500 contacts | Depends on the disk space. |
| Risk of loss | Low (synchronization) | Medium (physical wear and tear) | High (when resetting the phone) |
Preparation of the address book Xiaomi Redmi Note 9 for transfer
Before the export procedure is strongly recommended to conduct an audit of existing records. owners of Redmi Note 9 often do not notice that their contacts are scattered across different sources: some are stored in a Google account, some in the memory of the phone, and some may have remained since the old device in the "Phone" section.
Open the standard Contacts app and go to the display settings. Make sure all sources are displayed. If you see duplicates (same names with different numbers or vice versa), it is better to combine them or remove the extra ones so as not to clog the limited memory of the SIM card. MIUI has built-in tools for merging duplicates, which can be found in the contact management menu.
An important step is to check the encoding of names. Since SIM cards may not display Cyrillic correctly on some older devices, it makes sense to check what the names will look like after the transfer. Although modern cards support UTF-8, it is impossible to guarantee the correct display on any receiving device. If you plan to transfer contacts to a very old phone, it may be worthwhile to rename key contacts in advance using Latin or short abbreviations.
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Before mass transfer, try exporting 1-2 test contacts to the SIM card, insert the card into the target device and check if the Russian letters are correctly displayed and the number is cropped.
Step-by-step: export of contacts to MIUI
The MIUI shell interface installed on the Redmi Note 9 may be slightly different from standard Android, but the basic algorithm of actions remains the same. To start, you need to open the Contacts app (an icon with a human silhouette, usually in orange or blue) Do not confuse it with the Phone app (green handset), although the functions often overlap.
In the contact list that opens, find the menu button. Depending on the version of MIUI, it can be located in the upper right corner (three dots or three horizontal bars) or caused by long pressing on any contact. We need Import/Export contacts. This is the function that is responsible for all the operations of moving data between storages.
After you go to the import/export menu, the system will suggest you choose the direction of the operation. SIM-Note: If you have two SIM cards installed in your device, Xiaomi will offer to select a specific slot (SIM 1 SIM 2) to record. Select the card you plan to use in the future.
☑️ Algorithm for Exporting Contacts
In the next step, you will be asked to select the contacts to copy. You can mark them manually or use the Select Everything function (usually an icon with a tick or a square in the corner). After choosing, click the confirmation button (often an arrow or a Copy button at the bottom of the screen).
The copying process will take anywhere from a few seconds to a couple of minutes, depending on the number of records. SIM-card or reboot Redmi Note 9. Upon completion of the operation, you will receive a notification of success or an error report if any contacts could not be recorded due to card overflow memory.
⚠️ Note: If a message has been received during the export process that the memory SIM-The card is full, the process will stop. You will have to remove some of the old records from the map manually through the control menu. SIM-Contacts to make room for new ones.
Solving Common Export Problems and Mistakes
Despite the ease of operation, users of Xiaomi Redmi Note 9 may face technical difficulties. SIM-The card is inactive or not, and this can happen if the phone doesn't have a SIM card installed, it's locked. PIN-code (which has not been entered at boot time) or if all contacts have already been copied and the system considers the operation redundant.
Another common situation is a recording error, which often occurs when you try to write a contact whose name contains forbidden characters or is too long for the GSM format. In this case, the system may miss a particular entry by issuing an error report at the end, and the cause may be physical wear and tear on the card chip, which stops correctly accepting new data in certain memory cells.
If the export is successful, but on another device, the contacts are displayed as “Unknown Number” or instead of names – numbers, the problem lies in the encryption or save format. Some old phones can not read the Unicode encoding that modern Xiaomi smartphones use, in which case only manual renaming of contacts on the receiving device or using an intermediate VCF format will help.
What if the phone doesn’t see any contact with SIM?
Alternative methods of backup and transfer
Given the limitations of SIM cards, it is much more efficient for Redmi Note 9 owners to use modern data retention methods. The most reliable way is to sync with a Google account, in which case all your contacts, including photos and additional numbers, are stored in the cloud. When you install a SIM card in a new phone, you just need to log into your Google account, and the entire phone book will be restored automatically.
The second efficient method is exporting to a VCF file (vCard), which you can save to Xiaomi's internal memory, send to your messenger or email. VCF format supports all fields and has no restrictions on the length of the name. To transfer this file to a new device and open it, the system will suggest importing all records.
Xiaomi ecosystem users also have Mi Cloud, which allows you to create full backups of the system, including contacts, SMS and application settings, which is especially convenient when switching from one Xiaomi smartphone to another, as it allows you to recreate an exact copy of the working environment.
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Using Google or Mi Cloud cloud sync is much more reliable and informative than storing contacts on a SIM card, since it retains the complete structure of data and photos.