How to turn on the second line Xiaomi Redmi Note 8

Xiaomi Redmi Note 8 remains one of the most popular devices in the budget segment, and its functionality depends largely on the correct setup of communication. Many users buy this model precisely for the sake of using two SIM cards, which is extremely convenient for separating personal and work calls. However, immediately after unpacking the gadget, beginners often find that the second line is not active or is unstable, this can be due to firmware features, improper installation of the tray or failures in the MIUI software.

In this article, we will discuss in detail all the stages of activating an additional number, starting from the physical installation of the module and ending with fine tuning of program parameters. You will learn how to avoid common installation errors that can damage contacts, and how to set call priorities for maximum comfort. SIM-cards will allow you to fully unlock the potential of the device, ensuring uninterrupted communication in any conditions.

Before you get to software settings, you need to make sure that the physical part of the process is done correctly. Often the problem lies in the loose attachment of contacts or contamination of the tray. If you just bought a device or changed operator, carefully follow the installation instructions to avoid hardware conflicts at the start of operation of your Redmi Note 8.

Physical installation SIM-cardboard

The first and most important step is to properly install the SIM card in a special tray located on the lower end of the case.The Xiaomi Redmi Note 8 device features a combined hybrid type slot, which means the ability to install two Nano-SIM SIM cards or one SIM card and MicroSD memory card. To extract the tray, use a special clip included in the kit, or a thin needle, gently pressing into the hole next to the slot.

One side usually has a cutout or bevel that should match the shape of the SIM card. If you try to insert the card forcefully in the wrong position, there is a risk of damaging the contacts or the reader itself. Make sure that the gold pins of the chip point down and the bevelled corner of the card matches the marking on the tray.

⚠️ Warning: Never try to insert a tray into the case of a smartphone unless the SIM card is tight and flat.The protruding edge of the card can jam the mechanism or damage the reading pins inside the phone.

Once both cards are in their cells, the tray needs to be put back in place. It needs to enter the case easily, without undue effort. If you feel resistance, don't push, pull out the tray and check the position of the cards again. The properly installed module is fixed in the same level with the body, without creating protrusions.

Primary activation via the settings menu

When you turn on your smartphone, MIUI will automatically detect new SIM cards. Usually, a notification of modules found appears on the screen with a suggestion to activate them. If there is no automatic window, you need to go to the settings menu manually. To do this, find the gear icon on your desktop or in the notification curtain and select the section responsible for network settings.

In the menu you will need to find item two. SIM-This is where you control both slots, and you can label one card as your primary call card and the other as your Internet card, but you can change that setting, and you can activate the second line by switching the corresponding slider to the active position.

Sometimes the phone only sees one card, even though there are two cards physically installed, and then you should try swapping them in the tray, which will help you determine if the problem is in a particular slot, in the SIM card itself, or in a software failure, and if the second line is working after the reposition, then the first slot has been temporarily difficult.

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If one of the SIM cards is not identified, wipe its contacts with a soft rinse or dry cloth - oxidation can interfere with the connection.

Setting Call Priorities and the Internet

When both lines are activated, the user is faced with the issue of traffic management and voice communication. Xiaomi Redmi Note 8 allows you to flexibly configure which SIM card will be used by default for various actions. This is especially important if the tariff plans of operators are very different in the cost of a minute or a gigabyte of traffic.

In the SIM management menu, you'll find the default section for installing the cards, and you can choose which number to use to make outgoing calls, send them. SMS-It is recommended to set traffic limits immediately to avoid unexpected costs if you switch to a more expensive tariff.

• 📞 Voice calls: Select Always Ask if you want to control every call, or lock in the main SIM card.
• 🌐 Mobile Internet: Assign a card with unlimited or cheapest traffic to transfer data.
• 💬 SMS: Usually leave the same card as for calls, so that the history of correspondence is kept from the same number.

Also available in this section is the Smart Limits feature, which allows you to prevent the second SIM card from switching to the mobile Internet if the first one stops catching the network, a useful option to save battery power and prevent background updates through expensive roaming.

Solving problems with the definition of the second SIM card

There are times when, after all the manipulations, the second line never appears on the list of available ones, which can be caused by a software failure in the radio module or a conflict of network settings. The first thing you do is try to restart the device in Safe Mode to eliminate the influence of third-party applications that could intercept network control.

If the reboot didn’t work, check network type settings. Sometimes a forced switch to 4G/LTE will block the second SIM card if the operator in your region doesn’t support this standard well on the old frequencies. Try temporarily changing your preferred network type to 3G/2G (auto) and check if the signal appears.

⚠️ Note: Resetting your network settings will delete all stored Wi-Fi passwords and Bluetooth pairs. Use this method only if other methods have not helped.

In a pinch, resetting your network to factory settings will not affect your personal files, photos or contacts, but will return all network settings to their original state, after which the phone will re-register on the operator's network, which often solves the problem of an "invisible" SIM card.

Use of Dual 4G Function

One of the key features of modern Xiaomi smartphones is the support of Dual technology. 4G. This means that both SIM cards can be simultaneously on fourth-generation networks, providing high speed and stability of connection. LTE in your region.

To activate this mode, in the SIM card menu you need to find the "Use" switch. 4G second SIM-By default, the second card often works in mode. 2G/3G This option will allow you to receive calls to the second line without interrupting the Internet on the first one, if you use VoLTE technology.

Keep in mind that the simultaneous operation of two 4G modules can increase battery consumption.If you do not need high speed on both lines at the same time, it is better to leave the second card in 3G mode. This will extend the battery life of the Redmi Note 8 without significant loss of communication quality.

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Dual 4G technology is available only with the support of the operator and the availability of the appropriate tariff option.

Frequently Asked Questions (FAQ)