Xiaomi smartphone owners often face a situation where the device refuses to save new numbers or display old records if the storage location is chosen. SIM-In the Redmi 9, which is based on the shell. MIUI, This problem has its own peculiarities related to the security policy of Android and the specifics of the phone book. The user enters a number, presses the save button, but the system either silently ignores the action, or gives an error, or saves the record to "nowhere", after which it disappears when restarting.
The main reason lies in the fact that modern versions of the Android operating system are gradually abandoning the use of the new operating system. SIM-The limit of the characters for the contact name on the SIM is extremely small, and the storage format does not support additional fields such as email, address or multiple numbers. However, for many users, the transition to cloud services or internal memory remains psychologically difficult, or dictated by the need to transfer data to a button phone.
In this article, we will take a closer look at the technical reasons for the Redmi 9 crash, check the application permission settings, and look at alternative ways to securely store your phone book, learn how to fix the “failed to keep contact” error, and why the system can force a record to be redirected to a Google account even if you choose SIM.
Technical Limitations and Policies of Android in MIUI
The first thing to understand: SIM-A card is an outdated medium with a very limited architecture, and unlike a smartphone or cloud storage, a SIM is not designed to overwrite data frequently. When you try to keep a contact on Xiaomi Redmi 9, the system checks the integrity of the card file system. GSM (e.g. using emoji or special characters in a name, the recording is blocked at the hardware level.
The MIUI shell has built-in security mechanisms that can block a record on SIM if the Contacts or Phone app does not have the appropriate permissions or if the system considers the operation to be risky. Often users do not even suspect that synchronization with a Mi Account or Google account is running in the background, which conflicts with an attempt to locally save. The system can automatically redirect the save to the cloud, ignoring the user's choice to prevent data loss.
⚠️ Note: Attempts to record contact with a longer name 15-20 symbols or containing rare unicode symbols SIM-map 90% cases result in the name cropping or the system's complete failure to keep the record.
It is also important to consider the physical condition of the SIM-If you use a SIM issued more than 5-7 Years ago, her memory could be damaged or have limitations that are incompatible with today's smartphones. Frequently overwriting contacts on older chips results in "broken" memory cells that the phone sees but can't write anything into.
Verification of access rights and settings of the application
The most common software reason for refusing to save is the lack of necessary permissions from the system application. In Android 10 and later, which runs Redmi 9, access rights have become more stringent. If the Contacts or Phone application loses the right to read and write contacts, the system will block any action to add new records, regardless of the location chosen.
To diagnose, you need to go to the system settings. Open the Settings menu → Applications → All applications. Find the Contacts app (or Phone if dialing and book are combined) Click on Application Resolution. Make sure the switch opposite Contacts is activated. If it is turned off, the system will physically prevent the application from making changes to the phone book.
- 📱 Make sure that the "Allow" section has a "Allow" checkmark to access contacts.
- 🔄 Check if the background activity restriction is worth the "Contacts" app".
- 🗑️ Clear the app cache through the Memory menu" → "Clear the cache" without deleting the data.
- 🔍 Make sure that the correct application is selected by default for working with numbers if several.
It's also important to check the display settings. Sometimes contacts are saved successfully, but just don't show up in the list. In the Contacts app, click three dots in the corner or the menu button, select Display Settings or Contact Filter. Make sure you tick the “All Contacts” box or specifically select yours. SIM-If the filter is set to show only contacts from your Google account, you will not see new entries from the SIM.
☑️ Diagnostics of access rights
Synchronization errors and account conflicts
Xiaomi and Google’s complex synchronization system often creates conflicts that users perceive as a save error. If the account settings enable automatic contact synchronization, the smartphone may try to save the number to both the cloud and the SIM, which causes the process to be blocked. The system sees the desynchronization and cancels the operation so as not to create duplicates.
The solution may be to temporarily shut down sync. Go to Settings. → Accounts and syncs. Select your Google or Mi Account. Find Contact and turn off sync. Then try saving the number to your account. SIM-If the operation is successful, then the problem was the conflict of data flows.
Another reason may be memory overload. SIM-Old SIMs have a limit of 250 If you're trying to keep your contacts. 251-The system will give an error without further explanation. You can check the occupancy by opening the Contacts app, clicking on the menu and selecting Contact Management. → Copy contacts: The source and recipient selection window often displays the current number of occupied cells (e.g., the number of cells occupied, 248/250).
| Type of storage | Limit of name symbols | Photo support | Risk of data loss | Speed of access |
|---|---|---|---|---|
| SIM-map | ~20 characters | No. | High (when chip damage occurs) | Low. |
| Internal memory. | No restrictions. | Yes. | Medium (when resetting settings) | Tall. |
| Google Account | No restrictions. | Yes. | Minimum (cloud storage) | Depends on the network. |
| Mi Account | No restrictions. | Yes. | Minimum (cloud storage) | Depends on the network. |
What happens when you overflow? SIM-map?
Problems with room format and encoding
Sometimes the problem lies not in the storage area, but in the contents of the contact. SIM-The cards use standard encoding GSM 7-bit. If you enter a number with additional characters that are not supported by the standard, or use a non-standard recording format (for example, with brackets or letters), Redmi 9 may reject saving. +.
Try to keep contact with a minimum set of data: only a name (Latin) and a phone number without spaces and dashes. If such contact is maintained, then it is in the format. It is recommended to use a single international format: +79990000000. Any deviations from this format, such as 8-999... or +7 (999)..., can be interpreted by the system differently depending on regional settings.
If a contact with the same number already exists in the phone’s memory (even if it is hidden or in another account), the system can block the creation of a new record on the phone. SIM-Before you save a new number, it is useful to search the contact database to make sure the record is unique.
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Use the Latin for contact names stored on the SIM-Cyrillic names on old SIM cards can appear as Cracosabras or cause a saving error.
Failures in the work of telephony and cache
Not only is the app visible to the user responsible for storing and processing contacts on the Android system, but the Contacts Storage system service is also responsible for storing and processing contacts, and if this service fails or caches overflow, new records are no longer added, a classic problem that is solved by cleaning the system component data.
To do this, go to Settings → Apps → All Apps. Click on the three dots in the top right corner and select Show System Processes. Find Contacts Storage in the list. Click Clear → Clear Everything. Fear not, it won't delete your contacts, it'll just reset the database indexing settings. After that, the phone can "think" for a few minutes, restoring the list, but the record function should work.
Another effective method is to reset network settings, which is often ignored by users. SIM-The card is a network element, resetting network settings can restart the drivers of the chip. → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth. After the reboot, check the ability to save contact.
- 🛠️ Clear the data of the system application "Contact Storage".
- 📡 Reset network settings to restart the communication module.
- 🔄 Restart your smartphone in safe mode to eliminate the impact of third-party applications.
- 💾 Remove and re-insert. SIM-card after switching off the phone.
⚠️ Note: When cleaning the contact system store data, make sure you have a backup of important numbers, although in theory they should be downloaded from the database again.
Alternative solutions and data transfer
Given the limitations and limitations of the contact SIM-The smartest solution is to switch to cloud technology or storage in internal memory, which will save you from problems with character limits, encoding and physical wear of the chip. Contact saved in your Google account will automatically reset even if you lose your phone or break your screen.
If the use SIM-If you want to make a card, you need to use the copy function, and you need to save the new contact first to your phone's internal memory or to your Google account. Then go to Contact Management, select Copy Contacts, specify the source (Phone) and the recipient (SIM-This method works more stable than direct recording, since the system has already checked and formatted the data.
Regular backup of contacts with SIM-Cards use built-in tools MIUI. The Security or Services app often has a tool to migrate data, and you can also use third-party backup apps from Google Play. SIM-This will allow you to have a digital copy of the entire phone book in case of damage to the physical media.
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The most reliable way to avoid losing contacts on Redmi 9 is to store them in your Google account and use them. SIM-card only as a backup or temporary carrier when changing the device.