How to Enable Second Line on Xiaomi Redmi 5A: Full Guide

Modern life dictates its rules, and having two phone numbers has become a necessity for many users: some share personal and work calls, others look for profitable rates from different operators. Xiaomi smartphones, in particular the popular model Redmi 5A, fully support this feature, allowing you to work with two SIM cards simultaneously without losing the quality of communication.

However, despite the simplicity of the MIUI shell interface, beginners often have questions about the correct activation of the second slot. Sometimes the system does not see the card automatically, or the settings are downed after the update. In this article, we will discuss in detail all the stages of connection, from physical installation to fine-tuning the programmatic priorities of calls.

It's important to understand that the right work depends not only on the software settings, but also on the state of the device itself. If you just bought a phone or decided to replace your old SIM card with a new Nano-SIM format, follow the recommendations carefully, which will help avoid errors and provide a stable signal anywhere in the city.

Physical installation SIM-slot-card

Before you get to software settings, make sure both SIM cards are properly installed in the device tray.The Redmi 5A model features a hybrid slot, which means you can use two SIM cards or one card and a microSD memory card. Use a special clip included in the kit or a thin needle to extract the tray.

Carefully press the hole next to the tray on the bottom end of the smartphone. When the mechanism clicks and the tray extends, remove it. Pay attention to the shape of the cutouts: they correspond to the size of the Nano-SIM. If your card is larger, you will need a cropping or adapter, although the latter is not recommended to use to avoid getting stuck.

⚠️ Warning: Never try to force a SIM card into a slot. If the card doesn't fit perfectly in the contour, it's upside down or it's incorrectly installed. Mechanical damage to the contacts can cause the entire communication module to fail.

Put the first SIM card in the top slot and the second in the bottom slot, keeping the orientation in the bevelled corner. After installation, carefully return the tray to the place before clicking, and now you can move to the software part, where the main activation of the second line occurs.

💡

Use the original paperclip out of the box, as too thick objects can damage the tray extraction sensor inside the case.

Primary activation via the settings menu

After switching on the smartphone system MIUI It usually automatically detects two SIM cards and suggests you configure them. However, if you don't, you'll have to do it manually. Go to the main menu and select Settings. SIM-maps and mobile networks.

In the window that opens, you'll see a list of available slots. If the second slot shows up as "Inactive" or "Empty" even though the card is installed, try rebooting the device. Often, it's a simple system reset that allows the power controller to correctly question contacts and start the second line.

To activate, click on the icon of the second SIM card. You need to switch the slider to the active position. PIN-If you have the code on the card, enter the code provided by the operator and confirm the entry.

After successful activation, next to the signal indicator, a second network designation will appear at the top of the screen, usually with the number "2". If the status remains "No service", check whether your operator supports the frequencies that the phone is configured to in this region.

Setting Challenge Priorities and the Internet

When both lines are active, it's critical to properly distribute tasks between them. SIM-maps and mobile networks have sections for choosing the default card, so you can assign one SIM card to voice calls, and use the other card exclusively for mobile Internet.

The "Use for the Internet" option allows you to choose which channel data traffic will be transmitted through, which is especially true if the rates on different numbers differ significantly. Switching is instantaneous, but active downloads can be interrupted for a couple of seconds.

For calls, the system offers three options: always ask when dialing, use the first default card or the second. The choice of the option Always ask is convenient for those who often change the destination of numbers, but require extra action on each call.

Remember that while talking on one SIM card, the second one may not be available unless VoLTE is enabled. Check the support for this technology with your carrier for simultaneous voice and data transfer.

Solving problems with the definition of the second SIM card

Sometimes users are faced with a situation where the phone sees only one card, although both are physically installed, in which case the first step should be to check the contacts. Remove the tray and wipe the golden contacts of the SIM cards with soft dry cloth. Oxidation or fat from the fingers can disrupt the connection.

The second common cause is a software failure in the radio module. Try resetting the network to factory settings. Go to Settings → Advanced Settings → Reset and Reset → Reset settings Wi-Fi, mobile Internet and Bluetooth.

⚠️ Attention: Resetting network settings will remove saved Wi-Fi passwords and paired Bluetooth devices. Write down the necessary data in advance to reconnect.

If the software methods didn't work, maybe it's the tray itself or the contacts inside the phone. Try swapping the SIM cards, and if the problem moves with the card to another slot, then it's the SIM card itself or its compatibility.

Use of Dual SIM in Applications

The MIUI shell on Redmi 5A allows you to flexibly configure two-numbered apps, for example, messengers like WhatsApp or Telegram can be tied to a specific number, and the app typically uses the number from which the confirmation SMS came.

To manage calls in contacts, you can also set preferences. Open the Contacts app, select a subscriber, and click on editing. In the number field, you can often add a second contact for the same person and sign which SIM card you prefer to call from.

There is also an app cloning feature that allows you to run a second instance of the messenger for the second SIM card, this is done through Settings → Applications → App cloning, so you can receive messages from both numbers into separate icons on the desktop.

Don't ignore data roaming settings if you're planning trips.Make sure that for a second SIM card that isn't used for the internet, roaming data transfer is off to avoid unforeseen costs.

💡

Proper configuration of applications and cloning of messengers allow you to fully use both numbers for communication, without confusing the contexts of correspondence.

Optimizing battery consumption with two SIM cards

The two active communication modules increase the battery load. The smartphone continuously scans the airwaves, maintaining a connection to two different carrier towers, which can lead to faster battery discharge compared to using a single SIM card.

To minimize power loss, turn off the second SIM card at night or in areas of poor reception, where the phone will constantly search for the network and waste charge, and you can do this quickly through the notification panel, long pressing the SIM management icon.

Also watch for network mode. If there is no 4G coverage in your area, switching to Preferably 3G or 2G mode for a second, less important SIM card can significantly extend the battery life of the device without losing the ability to receive calls.

⚠️ Attention: Constantly searching for a network in the area of insecure reception "eats" up to 40% of the battery charge faster, in such situations, it is advisable to temporarily switch the phone to air mode or turn off the second line.

Check your battery consumption statistics regularly in your settings. If you notice that a particular application or process is consuming an abnormally high amount of power, you may need to reconfigure your settings or update your firmware.