The issue of how many SIM cards are supported in the Xiaomi Redmi Note 8 Pro is one of the most popular among owners and potential buyers of this smartphone. Despite the fact that the device entered the market a few years ago, it remains relevant due to its functionality and affordable price. For many users, the ability to use two numbers at the same time is a critical feature.
In this article, we will discuss in detail the tray architecture, the types of cards supported, and the nuances of working with communication modules, whether you can use two SIM cards and a memory card simultaneously, and how to install correctly to avoid damage to contacts.
Understanding how the slot works in your gadget will help avoid common mistakes when replacing an operator or expanding storage.We will look at the physical parameters of the tray and the software constraints that the MIUI operating system imposes.
Slot architecture and types of supported cards
The Redmi Note 8 Pro features a combined card slot, which is standard for mid-range devices of the period, a retractable platform that is retrieved using a special paper clip that comes with the package, and the design involves the use of Nano-SIM cards, which are the smallest in the market at the moment.
Inside the case, there is one physical tray that has two notches for SIM cards. However, one of these notches is versatile and can be used either for a second SIM card or for a microSD memory card. This means that you can't physically install two SIM cards and flash memory at the same time unless you resort to complex and risky modifications.
Importantly, both SIM cells support 4G LTE networks, which means that Dual SIM is fully functional, and you can assign either card to the main data transfer system, allowing you to flexibly switch between them without having to physically rearrange the modules.
⚠️ Warning: Never try to insert a microSD card into a slot designed only for the purpose of SIM, without checking the specification of the specification of the specific region of supply, as this may lead to short circuits of contacts.
To work properly, you need to make sure that the notches on the cards match the shape of the tray. Micro-SIM or Standard SIM cards require trimming or the use of adapters, which is not recommended with the main numbers because of the risk of chip damage.
Two SIM cards in Redmi Note 8 Pro
The MIUI shell on the Xiaomi Redmi Note 8 Pro provides advanced tools for managing two active numbers, allowing users to configure use cases where one number is used primarily for voice calls and the other for mobile Internet, and this flexibility allows optimizing communication costs.
In the settings of the device is available section Two SIM-maps and mobile networks where the main control is taking place, SMS In addition, the system offers a function “Smart limits”, which helps to control traffic and the cost of conversations on each SIM card separately.
One key feature is support for VoLTE technology, which means that if your carrier supports this feature, while you are talking on one SIM card, the second one will remain available for incoming calls or continue to transfer data in the background, which eliminates the problem of the “unavailability” of the second number during a conversation, which is typical for older 2G/3G networks.
It's also worth mentioning the ability to assign different tunes and vibrations to contacts associated with different SIM cards, which allows you to instantly identify which number a call is coming to without looking at the screen. Personalization in Redmi Note 8 Pro is implemented quite deeply.
Instructions: How to properly install SIM-map
The process of installing cards in Xiaomi Redmi Note 8 Pro requires accuracy and compliance with a certain sequence of actions. Careless handling of the tray can lead to failure of the mechanism or damage to the internal contacts of the motherboard. Before the procedure, it is recommended to completely turn off the smartphone, although modern devices support hot replacement, reinsurance will not hurt.
To extract the tray, find a small hole on the bottom end of the device next to the speaker or microphone. Put a needle in the delivery kit and press it until the characteristic click. The tray will move automatically. Pay attention to the orientation of the cards: the bevelled angle must match the pattern on the tray.
☑️ Pre-installing check SIM
Once the cards are installed, insert the tray back into the case, the device will turn on and search for the network. If the SIM cards are correctly identified, two signal level icons will appear in the status bar. If that does not happen, check the density of the cards and the purity of the contacts.
In some cases, it may be necessary to enter PIN-If you don't know the code, it's best to disable its request through the security settings of another phone before moving the SIM to the Redmi Note 8 Pro. Three incorrect input attempts will result in a card lock and a request PUK-code.
⚠️ Note: Do not use glue or tape to fix cards in the tray, as when the smartphone is heated, the glue can melt and permanently jam the extraction mechanism.
Use a memory card instead of a second SIM
As mentioned earlier, the slot in the Redmi Note 8 Pro is hybrid, which means that the user has to choose whether to use the second slot to expand internal memory or for a second SIM card. If you are critically important to have a microSD flash card, only one SIM card and drive can work at the same time.
To install the memory card, you need to remove the tray and place the microSD in a second cell designed for Nano-SIM. The system automatically recognizes the new drive and suggests configuring it, you can use the card as a portable storage for photos, music and documents, or try to combine it with internal memory.
Features of memory unification
When choosing a memory card, you should pay attention to the speed of writing and reading. For comfortable applications and recording high-resolution video, it is recommended to use Class 10 or higher cards. Slow cards can cause delays when opening files and camera operation.
If you decide to go back to using two SIM cards, you have to retrieve the memory card, you can transfer the data from the flash drive to your computer or to the cloud storage, and MIUI has convenient tools for backing up files.
Table of technical characteristics of the SIM slot
For ease of comparison and understanding of the capabilities of the device, we have collected the basic parameters of the communication module in the Xiaomi Redmi Note 8 Pro in a single table.
| Parameter | Slot 1 | Slot 2/Hybrid |
|---|---|---|
| Type of card | Nano-SIM | Nano-SIM or microSD |
| Support for 4G LTE support | Yes (main) | Yes (secondary) |
| Hot replacement. | Supported | Supported |
| Maximum SD volume | - | up to 512GB (officially) |
As you can see from the table, both slots are equivalent in terms of supporting modern communication standards, but having a memory card blocks the ability to install a second communication module, a compromise that engineers have made to keep the case compact.
Official support for memory cards up to 512 GB does not mean that larger cards will not work. Often, the Redmi Note 8 Pro works successfully with 1 TB drives, but there is no guarantee of stability in this case.
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Use the "Conductor" app in MIUI to quickly sort files between internal memory and SD-card-free.
Frequent problems with definition SIM-map
Sometimes users are faced with a situation where the smartphone stops seeing one or both SIM cards, this can manifest itself in the appearance of the icon “No network” or message «SIM-There may be several reasons for this malfunction, from a software failure to physical damage.
The first thing you need to do is to reboot the device, which often solves the problem of a temporary failure in the radio module, and if the reboot didn't work, try removing the SIM cards, wipe the contacts with dry soft cloth and insert them back, making sure that the position is correct.
It's also worth checking if the flight mode is activated in the settings or if the SIM card itself is software-enabled. SIM-If the problem persists, check the SIM card on another phone.
⚠️ Warning: If the SIM card doesn't work on other devices, it may have malfunctioned or needs to be replaced by a carrier.Do not try to clean the chip with alcohol or aggressive chemistry.
In rare cases, the problem may be a firmware update that contains bugs. Check for system updates in the Settings → About Phone menu. Installing the current version of the software often fixes bugs associated with the communication module.
Internet setting and data transfer
When using two SIM cards, it is important to set up your Internet Access Point (APN) correctly, especially if you are using different carriers' tariffs. In the Redmi Note 8 Pro, settings are usually set automatically when the card is first activated, but sometimes manual correction is required.
You can assign one SIM card to the main one for data transfer, while the second one will be used only for calls and SMS. If necessary, for example, to save traffic on the main SIM, you can quickly switch the mobile Internet to the second card through the notification panel.
Function “Assistant” SIM-card MIUI This allows you to automatically switch to a card with better coverage in the roaming zone or at a weak signal, which is a useful option for those who travel often or are in areas of unstable reception.
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Proper APN configuration guarantees maximum 4G internet speed and stable connection to the operator’s servers.
Remember to control traffic, so you can set the limits for each SIM card separately, and when you reach the threshold, your mobile Internet will be turned off, saving you from unexpected expenses.