The problem of duplicate phone book entries is familiar to many Xiaomi smartphone owners, especially after migrating data from an old device or recovering from a cloud backup. On the Redmi 9 model running the MIUI shell, this situation can create serious discomfort, turning finding the right subscriber into a tedious process of scrolling through long lists. When the same number is saved several times under different names or with different extensions, communication efficiency is lost and the interface looks cluttered.
Fortunately, the Android operating system and the manufacturer’s proprietary shell offer several effective ways to solve this problem: You can use built-in cleaning tools, sync through your Google account, or consult specialized utilities from the Play Store. In this detailed guide, we will break down each method so that you can choose the most suitable for your situation and permanently restore order in the contact list.
Before we start mass removal, it is important to understand the nature of the duplicates, often because the contacts were kept simultaneously on the same page. SIM-The card and the phone's memory, or synced with different mailboxes without proper merging, will help not only to clean up the current list, but also to prevent it from being re-contaminated in the future.
Reasons for the appearance of duplicates in the phone book
The main reason for the mess in the contacts is the wrong sync setting, and when you first turned on your Redmi 9, the system might have suggested that you restore data from your Google or Mi Account. If the old device had both local and cloud contacts, they could be duplicated when they were transferred. SIM-cards or transferring numbers from button phones often leads to the fact that records are copied without checking for the existence of analogues.
Another factor is the work of messengers and social networks. Apps like WhatsApp, Telegram or Viber can automatically create or update entries in the phone book by adding avatars or changing the format of the name, which the system perceives as a new contact. Also worth mentioning is manual typing: in a hurry, users often save the number again without noticing that it is already on the list under the abbreviated name.
⚠️ Attention: Before any mass deletion operations are initiated, it is strongly recommended to back up contacts, which will allow data recovery in the event of accidental deletion of important information.
To understand the structure of data storage will help the following table, which shows exactly where duplicate records can be hidden:
| Storage source | Description of the problem | Risk of data loss |
|---|---|---|
| Memory. SIM-map | Limited volume, no additional fields | High when retrieving the card |
| Local phone memory | Doubles when resetting settings without a cloud | High when the device breaks down |
| Google account | Synchronization conflicts between devices | Low (there's a basket) |
| Xiaomi account (Mi Cloud) | Own synchronization ecosystem | Low (there is recovery) |
Use of built-in MIUI functions to combine
The MIUI shell installed on Redmi 9 has built-in contact management tools that users often ignore. The standard Contacts app can recognize potential duplicates if they have the same phone numbers but different names. To access these features, you need to open the app and go to the settings menu, which is usually hidden under three dots or a gear in the corner of the screen.
The management menu often includes a "Combine Repeated Contacts" option, or wording that depends on the firmware version and region, and will prompt you to view pairs or groups of contacts that it believes are the same people, you will only have to confirm the merger, and the system will automatically combine all the numbers and email addresses into one card, deleting the extra entries.
However, automatic merging doesn't always work perfectly. The algorithm can skip duplicates where numbers are written in different formats (e.g., +7 and 8, or via and without a hyphen). In such cases, manual verification is required. Open the contact list and carefully review it, paying attention to recurring names. When you find a take, select a card, click the edit button and find the "Connect contacts" or "Combine".
☑️ Verification by built-in means
And it's important to note that when you combine all the information from all the cards, you add up, so if one contact only had a mobile number, and the take had a work number and an email, the final card will store all that data, which makes the process safe in terms of losing useful information, but it takes care not to combine the namesake with different numbers.
Cleaning through Google Contacts Services
The most reliable and powerful tool for removing duplicates is Google Contacts. Because Redmi 9 is deeply integrated with Google’s ecosystem, most users store their records there, a technique that is particularly good in that it allows you to see the full picture and manage contacts from a large computer screen, which is much more convenient than pointing a finger into a smartphone display.
To get started, go to Google’s contact site via your browser on your computer or mobile. Make sure you’re logged in to the same account your Xiaomi is using. On the left side of the screen, you’ll see the navigation menu. Find the “Merge & fix” section. The system will automatically analyze the list and suggest combining duplicates or fixing contacts with missing names.
If the automatic offer doesn't cover all takes, you can use the manual selection function. In the contact list, tick those entries that are copies. After selecting a few cards, the "Combine" button will appear on the top. Press it, and Google will permanently delete duplicates, leaving one full entry. Changes are instantly synchronized with your Redmi 9 when you have the Internet.
What to do if your contacts are not synchronized?
The advantage of this method is that you can restore deleted or changed contacts within 30 days, which gives you additional insurance: if you accidentally connect the wrong people, you can roll back the changes through the Undo Changes feature in Google Contacts settings.
Application of third-party cleaning applications
When Google's built-in tools and services fail, specialized apps from the Play Store come to the rescue, and there are many tools that are designed to find and remove duplicates, and they use more flexible comparison algorithms to analyze not only numbers, but also the similarity of names, addresses, and even photos.
One of the popular solutions is the "Duplicate Contacts Cleaner" app, or something like "Contacts Optimizer," and once you install it, you'll need to give it permission to access the phone book, and it'll scan the database and give you a list of the duplicates you found, and you can preview them and choose the deletion strategy, automatic or manual.
- 📱 Automatic Cleaning: The app itself finds and removes duplicates without your intervention, leaving a report on the work performed.
- 🔍 Smart comparison: Algorithms find duplicates even when numbers are partially matched or names are spelled with different errors.
- 💾 Backup: Most of these applications backup before cleaning, which is a critical security feature.
⚠️ Warning: Be careful when giving third-party apps full access to your contacts. Choose only proven utilities with high ratings and a large number of reviews to avoid leaking personal data.
Using third-party software is especially important if you have a dirty database built up over the years using different phones, which can do work that would take hours to do manually in a few minutes, but once cleaned, it is recommended to remove the cleaner application itself so as not to keep any extra software in the system.
Manual deletion and editing of records
Despite the availability of automatic tools, manual methods are sometimes the only sure way to clean up, especially when it comes to complex cases: for example, if a person has changed a number but the old one is saved as a separate contact, or if the names are written in different languages. On Redmi 9, the manual removal process is simple enough, but requires perseverance.
Open the Contacts app and go to List View mode. Swipe your finger around the screen, look for repeating names. When you click on the contact, you will be taken to a card where the bottom or top corner (depending on the MIUI version) is the Delete button or the basket icon. The system will ask for confirmation — press OK or Delete.
For more advanced management, use the Favorites or Group Creation function, you can temporarily create a Delete Group, drop suspicious duplicates there, and then delete the entire group at once. The editing function is also useful: instead of deleting, you can open a duplicate card, copy the missing number (for example, a work card) and paste it into the main card, then delete the take.
💡
Use contact search to speed up the process, type a part of the name or phone number into the search bar, which will instantly filter the list and show all the variations in the subscriber's record.
The good thing about manual is that you have complete control of the process, you don't run the risk of bringing two different people together with the same names, which is what happens with automation, but you just have to take your time and do regular audits so that the base doesn't get trashed again.
Prevention: How to avoid doubles in the future
To make sure that the question of how to delete duplicate contacts on Xiaomi Redmi 9 is no longer bothering you, it is important to have the right data storage system. Key rule: choose one main source of truth. For most users, that source should be a Google account. Set your phone up so that all new contacts are saved there by default, not on the phone. SIM-map.
Check your sync settings regularly, make sure that all your devices (tablet, old phone, work smartphone) are synced to the same account. Avoid manually copying contacts from your phone. SIM-maps, unless absolutely necessary. SIM-Cards are limited in scope and often crop long names or lose extra numbers.
- 🔄 Single Account: Use one primary Google account for all devices.
- 🚫 Refusal SIM: Don't save new numbers on SIM-map, use the cloud.
- 🧹 Regular cleaning: Check the list for duplicates every six months through Google’s web interface.
Compliance with these simple digital hygiene rules will allow you to keep your phone book in perfect condition. Redmi 9 is a powerful smartphone, and the right setup of its software part will make using the device even more comfortable and efficient.
💡
The best way to prevent duplicates is to keep all contacts exclusively in your Google cloud account and avoid storing data on your account. SIM-map.