Xiaomi, Redmi and Poco smartphone owners often notice a synchronization feature in their Mi Account settings, not just a technical feature, but a mechanism that copies your call history to the company's servers. Many users are scared that someone is listening to their conversations, but in fact the process is much more prosaic.
It stores the logs of incoming, outgoing and missed calls in cloud storage, which allows you to quickly restore your contact list and communication history when you buy a new device or after resetting your settings, and calls synchronization works in the background and requires minimal traffic, since only numbers, time and duration of a call are transmitted, but not audio recordings.
Understanding how this system works will help you to configure security and privacy in a smart way, and in this article, we will take a closer look at the technical aspects of cloud call history, assess the risks, and provide step-by-step instructions for managing this feature.
Technical essence of the synchronization process
When you activate an option in Mi Cloud, the MIUI or HyperOS operating system creates a local database of all the actions taken in the Phone application, which is periodically checked with the server, and if you make a new call, information about it is sent in encrypted form to the remote server.
It's important to understand the difference between metadata and content. Call synchronization only transmits digital data: subscriber number, date, start and end time, and call type (incoming/outgoing). Audio stream, which is the speech of the interlocutors, never enters the cloud through this channel.
⚠️ Note: If you use the call recording feature and set up automatic uploads to the cloud, audio files can take up significant space. Make sure that voice recording sync is disabled if you want to store only text logs of calls.
It happens automatically when you connect to Wi-Fi or mobile Internet, depending on your settings. The system aims to minimize battery consumption, so synchronization is usually done in batches rather than after each individual beep.
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To save traffic, set up sync only over Wi-Fi. This is especially true if you have a large volume of call history and a tariff plan with limited Internet.
Why you need a cloud call history
The main purpose of this feature is to ensure continuity of user experience. Imagine if you crashed your smartphone screen or lost your device. You buy a new phone of the same brand, type in your Mi Account, and see the entire history of communication over the past months.
This is convenient for business users who often change devices or use multiple gadgets at the same time. data recovery is almost instantaneous, saving time manually searching for numbers in paper notebooks or screenshots.
Also, it serves as a backup. Accidental clearing of the call log on the device will not lead to irretrievable loss of information, since the copy is stored on the server. You can return deleted records simply by doing reverse synchronization.
- 📱 Instantly restore contacts and call history on a new device.
- 💾 Backup data in case of breakage or loss of the smartphone.
- 🔄 Unified call history when using a tablet and a phone with one account.
However, not all users like to have their digital activity stored on third-party servers, and for them, local privacy is more important than ease of recovery.
Security and confidentiality issues
Stored call data on Xiaomi servers has raised questions among digital health users. Despite the company's claims to use encryption, any centralized data collection is potentially vulnerable.
If your account is hacked, the attacker will not only have access to your contacts, but also to the full picture of your social connections, and he will be able to see who you called and when you called, analyze the frequency of your communication, and this can be used for social engineering.
On the other hand, local storage of data on a device without a password or with a simple PIN-The code is also not safe in the event of physical phone theft, and the cloud is an additional barrier because it requires authorization.
| Parameter | Local storage | Synchronization (Mi Cloud) |
|---|---|---|
| Availability | Only on the device. | From any device |
| Risk of loss | High (when broken) | Low. |
| Privacy | Depends on phone protection. | Depends on account protection |
| Place. | It takes up the phone's memory. | Takes up space in the cloud |
What does the privacy policy say?
How to turn on or off the function
Synchronization control is in the deepest settings of the system. The interface may vary slightly depending on the version of MIUI or HyperOS, but the logic remains the same. You don't need superuser rights or a computer.
To start, open the Security app or go straight to Settings, and find the section that handles the account, and that's where the switch that controls the call data is hidden.
⚠️ Warning: Before you turn off sync, make sure your data is stored locally.If you turn off the feature and clear the phone app cache immediately, the history may disappear without the possibility of recovery.
The sequence is simple, but it requires care. Don't confuse call synchronization with contact synchronization. These are different services, although they're often on the same menu.
☑️ Algorithm of synchronization off
Once turned off, the system may ask what to do with the data already uploaded to the cloud, usually prompting you to delete it from the server or leave it, and the choice depends on your plans for future use of the acc.
Storage management and data cleanup
Even if you turn off sync, old data can stay in the Mi Cloud. It takes up space in your free storage, which is often only 5 GB. That’s not much, given the volume of modern photos and videos.
You can clear your call history through the web interface, and you can go to the official cloud service website from your computer, and it has a more detailed data management interface than you would have on your mobile application.
In the Call History section, you can see a list of all synchronized calls, which can be deleted selectively or cleared at once, and this is irreversible, so it's worth weighing the decision.
- 🗑️ Complete cleanup makes room for new backups.
- 🔍 Through the web interface it is easier to search for specific numbers in history.
- ⏱️ Deleting data on the server does not remove it from the phone if synchronization is turned off.
Regularly reviewing cloud storage helps keep things in order and ensures that you only pay for the services you actually use.
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Regularly checking cloud storage allows you to control what data about your activity is stored on the company’s servers.
Alternative solutions for reservations
If Xiaomi’s built-in tools are not credible, you can always use third-party methods.The Android ecosystem allows you to flexibly configure data backups without being tied to a single manufacturer.
The most popular option is Google Contacts and Google Drive. Android defaults to save your call history and SMS to your Google account, which is often more secure because Google encrypts your customer-side data.
There are also dedicated backup apps like SMS Backup & Restore that let you create full copies of call logs and save them locally or upload them to your personal Google Drive or Dropbox.
Using third-party solutions gives you complete control over files, you know where the file with the history lies, and you can destroy it at any time or transfer it to the hard drive.