Owners of Xiaomi smartphones, especially the Redmi 9, often face the problem when the phone book turns into chaos due to multiple copies of the same numbers.It is not just a visual defect, but a serious problem that prevents you from quickly finding the right contact or identifying an incoming call.Duplicates can appear after synchronizing with various services, transferring data from another device or installing third-party messengers.
To make matters worse, the MIUI system on Redmi 9 stores records by default in multiple sources: phone memory, Google account, and Mi Cloud. When these sources are combined, conflict arises, resulting in multiple copies of one person. Fortunately, the shell has powerful tools for ordering that do not require deep programming knowledge.
In this guide, we will look at all the cleaning methods available, from built-in Contacts to cloud services. Manual cleaning is effective with few records, but automated methods will save hours of time. It is important to act consistently so that important data is not lost in the optimization process.
Reasons for the appearance of duplicates in the phone book
Understanding the source of the problem is key to solving it successfully, and more often than not, duplicates are caused by incorrect data synchronization, for example, if you switched from another Android smartphone and restored a backup, contacts could be copied over existing Redmi 9 memory, and the system perceives them as different records, even if the numbers match.
Another common reason is that you have multiple accounts at the same time, and if you have both a Google account and a Mi Account in your phone's settings and, say, a corporate Exchange, the phone tries to combine all the listings into a single interface, and without the filters being set up correctly, it results in triple or quadruple names.
⚠️ Warning: Before any contact manipulation is initiated, it is strongly recommended to back up.A mistaken deletion or merger may result in the loss of important numbers without the possibility of recovery.
Also worth mentioning are third-party apps: Messengers like Telegram or Viber often create their own records or metadata that can conflict with the system ledger, and caching data with these apps sometimes leads to “phantom” copies that are displayed when searched.
Built-in tool for connecting contacts in MIUI
The MIUI shell on Redmi 9 features a native anti-double feature that is often overlooked, and is the most secure method because it uses the system’s algorithms to analyze matches. To take advantage of it, open the standard Contacts app and navigate to settings usually hidden under a three-dot or gear icon.
You need to find the settings menu, Contact Management, and this is where you hide the "Combine Repetitives" function, and the system will scan the entire database, and the algorithm will compare phone numbers, names, and email addresses to find the exact matches.
☑️ Verification of the association settings
Once the scan is complete, Redmi 9 will show you a list of duplicates found, so you can view each group and confirm the merger manually, or select the "Combine All" option, which will create a single card that will summarize all the numbers and mailing addresses previously scattered across different records.
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If the automatic unification missed some pairs, try changing the name in one of the entries manually by adding a space and then returning it back – this sometimes triggers a recheck by the system.
Sync and clean up through Google Contacts
The most reliable way to keep your phone book in order is to use the Google ecosystem. Google Contacts has its own powerful duplicate detection and merging engine that works independently of your phone’s firmware. First, make sure your contacts are stored in your Google account, not your phone’s memory.
Go to the settings of Redmi 9, select Accounts and Sync, then click on Google. Make sure the switch opposite Contacts is active. After that, the system initiates a background upload to the cloud, which can take time depending on the number of records.
| Parameter | Local storage | Google Contacts | Mi Cloud |
|---|---|---|---|
| Access to PC | No. | Yes (contacts.google.com) | Yes (i.mi.com) |
| Merger instrument | Basic | Advanced (Fix & manage) | Basic |
| Risk of loss | High on discharge | Low. | Low. |
| Speed of operation | Depends on the network. | Depends on the network. |
To clean up, open your browser on your computer or in full mode on your phone and go to contacts.google.com. From the menu on the left, select "Combine and fix" (or "Fix & manage" → "Merge & fix"). Google will automatically find duplicates and prompt them to merge. Once you perform the operation on the site, the changes are synchronized with your Redmi 9 on the next Internet connection.
Using Mi Cloud to Manage Records
Xiaomi owners have access to their own cloud service Mi Cloud, which also works with contacts. This method is convenient if you are actively using the Mi ecosystem. Go to the phone settings, select your Mi Account and go to the Mi Cloud section.
In the cloud interface, find the Contacts section, where you can manage the web interface, click on the web version, or use the PC control button. The web interface often has more detailed filtering settings than the mobile application, and you can see which contacts are taking up space and where the duplicate is stored.
⚠️ Note: When syncing through Mi Cloud, make sure you don't create a sync loop where the phone copies data from Google to Mi Cloud and then back again, creating endless copies.
The Recovery feature in Mi Cloud is also useful if you accidentally delete the necessary records during the cleaning process, and the service stores a remote contact archive for 30 days, which allows you to roll back to the state of the phone book before the cleaning experiments begin, which is an important insurance policy.
What if the Mi Cloud can’t see the contacts?
Manual deletion and card editing
Automatic systems are not always perfect. There are times when numbers are written in different formats (like +7 and 8) and the algorithm doesn't recognize them as a single contact. In such cases, Redmi 9 has to be manually cleaned. Open the contact, press the edit button (pencil) and check the fields carefully.
Often, the duplicate is hidden in additional fields, like you have a contact "Ivan" with the number, and separately "Ivan Work" with the same number. In MIUI, you can add several numbers to one card. Just copy the number from the duplicate and paste it into the main entry, and the second one - delete. This is the most radical, but effective method.
To speed up the process, use search. Type the person's name into the Contacts search box. If the system produces multiple results with the same number, this is a clear candidate for deletion. Remember, you need to delete the duplicate record, leaving the one that is tied to the main sync account.
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Manual editing is necessary when automation can not cope with different formats of recording numbers or errors in spelling the name (for example, "Alexei" and "Lesha").
Third-party applications for cleaning duplicates
If Xiaomi's built-in tools don't seem functional enough, there are plenty of customized tools in the Google Play store. Popular apps like Duplicate Contacts or Contacts Optimizer use complex comparison algorithms, and they can find matches even when names are partial or numbers are similar.
When you install an app on Redmi 9, be sure to give it the necessary permissions to access the phone book. Without that, it won't be able to analyze the data. Most of these tools work on a found-proposal-deleted basis. You can choose to clean automatically or confirm each action.
However, be careful with access rights. By transferring the contact database to a third-party developer, you risk data privacy. It is recommended that you immediately delete the application after use or revoke its permissions in the privacy settings.
Preventing the appearance of duplicates in the future
To keep the problem from returning, it is important to set up the correct data retention policy. The main rule is to keep all new contacts in only one place, preferably in a Google account. When you create a new number, the system will suggest you choose a save location - always choose Google, not Phone or SIM.
Check your sync settings regularly, and if you stop using a service (such as corporate email), turn off syncing contacts for it in your account settings, which will prevent old records from reappearing the next time you update.
It’s also helpful to log in to the Google Contacts web version every few months and check the “Merge and Fix” section, which takes a couple of minutes, but ensures that your Redmi 9 phone book is always clean and up-to-date. Data purity is the key to the fast work of the directory and the correct definition of Caller ID.