How to switch from one SIM to another on Xiaomi Redmi 4

Owners of Xiaomi Redmi 4 smartphones often face the need to quickly change the source of mobile traffic, especially if the tariff plans on different SIM cards offer different conditions for roaming or data packets. The device is built on the basis of a Snapdragon processor and a MIUI shell, which allows you to flexibly manage network connections, but the settings interface can change depending on the version of Android. Proper management of access points and SIM card priorities allows not only to save budget, but also to significantly improve the stability of the connection in areas of uncertain signal reception.

In this article, we will take a closer look at all the available ways to switch the Internet between SIM cards on your gadget, learn how to set up automatic switching when a signal is lost, how to manually change the APN access point for a particular SIM card, and what hidden parameters can affect the speed of loading pages. Understanding these processes will help you avoid situations where the Internet is “hung” on an inactive or blocked SIM while the second one is idle.

Basic network settings in MIUIBefore you start complex manipulations, you need to make sure that both SIM cards are correctly defined by the system and are active. Go to the Settings menu, select the item SIM-Maps and mobile networks. This shows the status of each card, and this is where the primary setting of voice and data priorities is made. Redmi 4 is characterized by splitting the settings into two independent speakers, making it easier to manage dual-sim modes. It is important to understand that mobile Internet can only work through one active SIM card at any time, even if both have a positive balance and coverage. MIUI This allows you to do without restarting the device. If you are setting up a device for the first time, make sure that the sliders opposite the right SIM cards are activated and the network type is set to Preferably. LTE or 4G maximum speed. ⚠️ Note: When you switch the mobile Internet to another SIM card, the current connection will be severed for a few seconds to re-register in the operator's network. Press the mobile icon to go to the advanced SIM management menu.This allows you to quickly change your settings without wandering through the deep menu levels, which is especially convenient when frequent travel or changing your location often.

The easiest and most common way to get your phone to use the Internet from a specific SIM card is to change the default setting in the corresponding menu. Find the Use for Internet Connection section (or similar, depending on version) MIUI). In the list that opens, you will be asked to choose SIM card 1 or SIM card 2. After selecting, the system will instantly redirect all application traffic through the selected module. ⚠️ Warning: Make sure that data roaming is enabled on the selected SIM card if you are outside the operator’s home region, otherwise the internet will not work. Sometimes users forget that settings can reset after a system update or reboot unless a hard priority is set. Check the current status is carried out through the indicator in the status bar: icon 4G or+ If the icon is opposite the other, then the switch has not occurred, and you need to repeat the selection procedure. 📊 What is the most common way to switch the Internet? MIUIAutomatically I do not switch, using one SIM

Setting up access points APN If after switching the SIM card the Internet did not appear, the problem often lies in the incorrect settings of the access point. APN (Access Point Name: Each SIM card requires its own settings to access the WAN. Go to Settings → SIM-maps and mobile networks → (Select the desired SIM card) → Access points (APN). Here you'll see a list of available profiles for the current carrier. To work properly, you need to have a profile that matches your data plan. Often, when you change your SIM card, your phone tightens old or default settings that don't work. You can create a new access point manually by entering data received from the operator, or simply press the reset button (usually three dots in the corner of the screen) to restore factory settings. ☑️ Checking settings APNSelected the correct SIM card in the network settings Open section Access Points (APN)The desired access point is active (costs a marker) APN Corresponding to the operator's data: 0 / 4 The table below shows the typical parameters APN for popular carriers that may be needed to manually configure Redmi 4: Operator Name (Name) Access Point (APN) Type APN MTS MTS Internet.mts.ru default,supl MegaFon MF Internet default,supl Beeline Internet Internet.beeline.ru default,supl Tele2 Tele2 Internet internet.tele2.ru default,supl After making changes, be sure to save the profile and make sure it is selected (marked with a circle).In some cases, you need to restart the device or turn on and off flight mode to apply new network settings.

There are situations when the software switching of SIM cards does not give a result, and the phone continues to "hang" on the old network or shows no connection. In such cases, the effective method is to force the radio module to reset using flight mode, which causes the communication modules to completely disconnect and re-enter the network with new parameters. To perform this procedure, lower the notification curtain and click on the aircraft icon. 10-15 Then turn off flight mode, the system will start searching for networks, and if the settings are prioritized by another SIM card, Redmi. 4 It is registered on the network through it, updating IP-address and network settings. Flight mode completely de-energizes the smartphone radio module by resetting the network cache and forcibly initiating a new handshake with the operator's base station. This eliminates software freezes when the phone "thinks" it is already online but the data channel is not active. This method is especially useful when you cross borders of regions or countries. It helps to avoid situations where the phone clings to the weak network of the previous region, ignoring the more powerful signal of the new SIM card. Use this technique if the standard switching in the settings does not bring visible results in a minute.

For advanced users who want to minimize manual intervention, Xiaomi Redmi 4 offers automation capabilities through the built-in "Security" app or third-party utilities. MIUI It does not have the function of "smart switching the Internet" depending on the quality of the signal, you can configure notifications or use scripts. However, the most reliable way is to manually manage or use specialized applications from Google Play, such as “Switcher” or analogues that require root rights or special permissions. ADB. If you do not want to use third-party software, pay attention to the function "Assistant" SIM-You can set the behavior of the device when there is no network on the main SIM card, for example, you can allow data to be switched to a second SIM card if the first one is not available. This is not full automation, but a useful insurance against complete lack of communication. ⚠️ Attention: Third-party management applications SIM-Cards may require broad permissions; only use proven high-rated programs in the Play Market.

If you switch the Internet connection to Xiaomi Redmi 4 occurs with errors, first of all check the balance and status of the service "Mobile Internet" from the operator. Often the problem lies not in the plane of the phone settings, but in the blocking of the service on the provider side. Also, make sure that the SIM card is not damaged and sits tightly in the slot, as poor contact can lead to permanent network re-registrations. This action will delete all stored Wi-Fi passwords and Bluetooth settings, but return the network modules to their original state. → Advanced settings → Recovery and discharge → Reset your Wi-Fi, mobile internet and Bluetooth settings. After that, the phone will reboot and you will have to re-enter your Wi-Fi passwords, but mobile internet issues usually disappear. 💡If the Internet does not work on any SIM card after resetting, try to remove both SIM cards, wipe the contacts with a pin and insert them back, making sure that the correct orientation is correct.

The choice of switching method depends on your goals and the frequency of operator changes. For everyday use, you just need to configure the priority SIM card in the menu once. Travelers or those who use different rates for different tasks (e.g., separately for instant messengers and separately for streaming) may need to switch more often manually or use third-party tools. 💡The optimal strategy is to set the default primary SIM card for the Internet and switch to the second only if you need to save traffic or in areas of poor coverage of the first. MIUI Networking protocols allow you to manage your Redmi 4 resources efficiently. Don’t be afraid to experiment with the settings. APN And priorities, because it doesn't pose a risk to the data on the device, but it can significantly improve the quality of communication. Can you set up automatic Internet switching depending on the application? MIUI on the Redmi 4 It's not a feature. It allows you to select one SIM card for all the data at once. It requires root rights and specialized software to divide the traffic between applications, like NetBridge or similar firewalls. Why is the Internet slow after switching the SIM card? This may be because the phone is registered on the network. 2G/3G instead 4G. Check the network type settings for the selected SIM card, and the speed may drop due to operator network congestion or the exhaustion of the high-speed traffic limit on the tariff, whether you need to remove the SIM card to switch the Internet? No, you don't have to physically remove the SIM card. All switches are programmatically through the settings menu. You only need to remove the card if it's physically broken or if the phone has stopped seeing the SIM card at all. Does switching the Internet on battery charge? The switching process itself consumes minimal energy. However, if the phone is in the area of insecure reception and constantly searches for the network or switches between towers (which can happen when you have incorrect priority settings), battery consumption can increase significantly.