Xiaomi Redmi 7 is a classic representative of the budget segment, which is still actively used due to its reliability and autonomy. SIM-But managing mobile traffic on two SIMs often raises questions among owners, especially when switching from single-sim devices or other brands.
In the Android-based MIUI operating system, the switching logic is implemented through the settings menu, not through the notification curtain, as some other shells do. Mobile Internet by default works on only one selected SIM card, while the second can be used exclusively for calls and SMS, unless a special feature is activated. Understanding the network interfaces in MIUI will help you manage costs and connection speeds efficiently.
In this article, we will discuss in detail all the nuances of priority settings. SIM-You'll learn how to quickly change the source of traffic, what to do if the Internet is lost after switching, and how to properly configure access points. APN It will also explore the hidden capabilities of the system, which allow you to automate the process or use traffic of the second card without manually switching each time.
The principles of double work in MIUI
The radio module architecture in Xiaomi Redmi 7 is designed so that the device can simultaneously connect to the network of both operators, but the data channel (4G/LTE) is active only on one of them. This limitation is not so much due to the software, but rather to the physical features of the antenna module and communication standards. The second SIM card at this point usually runs in 2G or 3G mode, providing only voice and text messages.
MIUI provides flexible tools to manage this process, so you can manually choose which SIM card will be responsible for data transfer, or set up automatic switching in case of signal loss. It is important to understand that when you use the navigator actively or download large files, the system will use the resource of the card that is assigned to the main one for the Internet.
⚠️ Note: When switching the main SIM-The current connection can be severed for a few seconds.Do not interrupt the process of downloading important files when the network priority changes to avoid data corruption.
It also allows you to flexibly customize usage scenarios, such as setting traffic limits for each card separately or setting threshold notifications, especially for gigabyte-limited tariff holders, where it is important to monitor traffic flow in real time.
Basic priority setting SIM-map
To change the map through which the phone enters the global network, you need to go to the appropriate settings menu. The interface may vary slightly depending on the version of MIUI, but the logic remains the same for all devices of the brand. First step, open the Settings app and find the section responsible for wireless networks.
Then you follow a sequence of actions that will lead you to choose a priority SIM card. In some versions of the firmware, this item may be called "Two". SIM-Maps and mobile networks, in others, are simply «SIM-Maps and mobile networks. Inside this menu is a key switch that identifies the source of mobile traffic.
☑️ Internet Switching Algorithm
Once you select a new card, the system can request confirmation of actions or warn you of a temporary connection break. Agree with the changes, and the indicator in the status bar (usually an up-and-down arrow) will move to the icon of the selected operator.
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To quickly check which SIM is going through the Internet, turn off Wi-Fi and open any site. In the upper status bar next to the icon 4G/LTE should be the number 1 or 2 corresponding to the selected map.
Use of quick menus and widgets
While the main control is deep in the settings, Xiaomi provides faster ways to switch.The standard notification curtain in the stock version of MIUI doesn't always have a button to change the internet, but it's easy to fix.You can add the appropriate widget to your desktop or customize automation scripts for more convenient access.
One of the most effective ways is to use the "Second Space" function or shortcuts, but the easiest way is to use the search bar in the settings. Just swipe down on your desktop, type in the word "Internet" or "SIM," and the system will suggest you go to the right switch, which saves time and eliminates the need to wander through the menu.
Also worth paying attention to the top curtain (Control Center), in new versions of the shell, when the icon of the mobile network (antenna icon) is pressed, the selection menu can open. SIM-If this feature is not in your Redmi 7, it means that your version of the data is not available. MIUI requires manual switching through settings, which is normal behavior for this model.
| Action. | The way is on the menu | Implementation time |
|---|---|---|
| Reposition of priority | Settings → SIM-cards → Internet | 10-15 seconds |
| Switching on/off | The notification curtain → Mobile Internet | 2-3 seconds |
| Searching for customization | Search in the settings → “Internet” | 5-7 seconds |
| Resetting the network | Settings → About the phone → Reset | 1-2 minutes |
Configure APN access points for different operators
Often the problem of lack of Internet after switching the SIM card lies not in the choice of priority, but in the incorrect settings of the access point. APN. For each operator (MTS, Beeline, MegaFon, Tele2, Yota) has its own settings that must be spelled out in the SIM card profile. If you just inserted a new SIM, Xiaomi Redmi 7 usually adjusts them automatically via the SIM card. SMS-message.
However, if the automatic setting didn't work, you'll have to enter the data manually. SIM-maps, click on the desired SIM and find the item "Access points (APN)». You need to create a new profile by entering data relevant to your region and operator, and a mistake in even one character can cause the mobile network to work, but the sites will not open.
⚠️ Note: Never delete standard profiles APN, If you're not sure what they're doing, create new records with unique names, so that if you make a mistake, you can easily roll back to the factory settings.
After entering all the parameters (name, APN, authorization type), be sure to save the profile and activate it by ticking the appropriate “check” or radio button. Rebooting the device after this procedure will help to consolidate the changes and establish a stable connection with the operator gateway.
Common errors in setting up APN
Automatic Switching and Smart Functions
MIUI has a useful feature that allows the smartphone to decide on which SIM card to use for Internet access, called Auto Switching or Smart Network Selection, which is useful in situations where the main SIM card loses signal or has a low connection speed.
By activating this feature, you allow the system to monitor signal quality, and if the main SIM card for the Internet loses coverage, the phone will automatically switch traffic to the second card if it has a stable signal, which eliminates the need to manually climb into the settings every time you enter the blind spot of one of the operators.
However, this feature has its own peculiarities: switching can occur not instantly, but with a delay of several seconds or even minutes.In addition, if the rates on both SIM cards are not unlimited, there is a risk of unexpectedly spending money from the second card account while you thought you were sitting through Wi-Fi or the main SIM. Therefore, using automatic switching is recommended only if there are batch rates with a large amount of traffic on both SIM cards.
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Automatic switching is a convenient tool for areas with unstable coverage, but requires cost control on both rooms to avoid unexpected costs.
Solving Connection Problems
Despite the simplicity of the procedure, users of Xiaomi Redmi 7 can face situations when the Internet does not work even after the correct switch. Most often the problem lies in the fact that the mobile Internet service itself is not activated on the operator's side or the traffic limit is exhausted.
Another common reason is network mode conflict: If you select 4G only in your settings and only 3G catches in your area, you will not have internet, and it is recommended that you set the network mode to 4G or Auto, so that the phone can freely switch between communication standards depending on the availability of towers.
It’s also worth checking whether the “Saving Traffic” or “Restricting Background Activity” mode is enabled for specific applications. Sometimes the system blocks network access for heavy programs to save battery power, which the user perceives as lack of Internet.
⚠️ Attention: If after all the settings and reboots, the Internet did not appear, try to remove the SIM cards, wipe the contacts with a lastic and insert them back. Contact oxidation is a common cause of unstable network operation in budget smartphones.
Additional recommendations and optimization
For Xiaomi Redmi 7 owners, therefore, managing priorities correctly is the only reliable way to organize work. Check traffic usage statistics in your settings regularly to understand which app is eating how much.
If you travel frequently, create separate APN roaming profiles. Many operators require special settings to work abroad. Check this information on the operator's website in advance, so that when you arrive in another country, you just choose the desired profile and enjoy the connection.
Remember that the software is constantly updated. If you haven't updated in a long time, check for new versions of MIUI. Updates often fix communication module errors and improve compatibility with new carrier standards. Up-to-date firmware is the key to stable operation of all network functions of your device.