How many? SIM-Maps supported by Xiaomi Redmi Note 8 Pro: full guide

The question of how many SIM cards can work simultaneously in the popular Xiaomi Redmi Note 8 Pro remains one of the most frequent among users planning to buy or already using this device.The smartphone, released in 2019, was a real hit thanks to a powerful processor and a great camera, but issues of communication functionality require special attention. Owners often need to combine personal and work numbers, and have access to mobile Internet in roaming without changing the main card.

The answer to the main question is clear: Redmi Note 8 Pro supports two SIM-cards standard Nano-SIM. However, it is not just two independent slots, but part of a hybrid system that imposes its limitations and provides unique features. Understanding the logic of the tray will help avoid errors in the installation and properly set the priorities of communication in the MIUI system.

In this article, we will take a closer look at the physical design of the tray, step-by-step installation instructions, and fine network settings that are often hidden from the eyes of the average user, how to correctly allocate roles between cards and what to do if one of them is no longer defined by the system, and also touch on the issue of memory expansion, which is directly related to the number of slots available.

Tray design and types of supported cards

Physical tray for SIM-cards in Xiaomi Redmi Note 8 Pro is located on the lower end of the case, to the left of the connector USB Type-C. The extraction uses a special metal clip that comes with the kit, or a thin point. The design of the tray is hybrid, which means there are two seats, but their functionality depends on what you decide to install.

Both slots are exclusively for Nano-SIM (4FF) cards, the smallest standard to date, which is completely devoid of the plastic edge typical of older Micro or Mini cards. The use of adapters or larger cards, even hand-cut, is highly undesirable, as this can lead to stuck mechanism or damage to contacts inside the smartphone.

⚠️ Note: Never try to insert two. SIM-One-slot cards or homemade adapters from Micro to Nano are guaranteed to cause mechanical jamming of the tray and damage to the reader.

The main feature of the hybrid slot is that the second place (SIM 2) can work either as a phone slot or as a slot for a microSD memory card. Simultaneous installation of a second SIM card and memory card is physically impossible, since they occupy the same space inside the case.

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Before installing a new one SIM-Make sure to wipe the contacts with a soft dry cloth. Fat marks from the fingers can cause poor contact and periodic failures in the identification of the network.

Step-by-step installation instructions SIM-map

The process of installing cards in the Redmi Note 8 Pro is simple, but requires accuracy and adherence to a certain sequence of actions.Incorrect orientation of the chip can lead to the fact that the smartphone will not see the card, or, in the worst case, to short circuit contacts.

• 📱 Find the hole on the end of the tray and press it with a clip before clicking, then remove the plastic holder.
• 💾 Arrange the Nano-SIM cards so that the bevelled angle coincides with the circuit on the tray, and the golden contacts are directed downwards.
• 🔌 Carefully insert the tray back into the case to the point, making sure that it stood up straight and does not protrude outwards.

After the device is activated, the system MIUI It will automatically detect new cards. If you're installing them for the first time, your smartphone will suggest you set them up for the default and mobile Internet calling purposes. You can change these settings at any time through the Settings menu. → SIM-maps and mobile networks.

It's important to monitor the status of the contacts in the slot itself, so if the tray was long gone or the smartphone was in dusty conditions, dust could get inside, and in such cases, careful purging with compressed air before re-installing the cards helps.

Set priorities and modes of network operation

The MIUI system on the Redmi Note 8 Pro provides flexible tools to manage two active lines, so you can assign one card to the primary for voice and the second card to the data service, or use it equally, especially for those who travel frequently or use tariffs from different operators to save money.

You can set up a setup menu to describe in detail the smartphone’s behavior, for example, by setting a rule that calls will always be made from the card that received the same call, and you can also use a smart data switching feature: if the main card runs out of money or the signal disappears, the smartphone will automatically switch traffic to the second card.

Support for communication standards is also noteworthy. Xiaomi Redmi Note 8 Pro supports 2G, 3G and 4G (LTE) networks. When two SIM cards are activated, one of them usually runs in 4G mode for data transfer, and the second can be put into 2G/3G mode for waiting for calls to save battery life. However, if both operators support VoLTE, both cards can work on fourth-generation networks simultaneously.

⚠️ Note: When switching network modes (e.g., with 4G on 3G) Communication may be interrupted for a few seconds, and it is not recommended to change these settings during an important conversation or download large files.

Table of slot characteristics and supported functions

To illustrate this, we can compare the capabilities of slots and their interaction with different types of cards, which will help us understand what to expect from the device in different use cases.

As you can see from the table, the flexibility of the system is high, but the physical limitation of one hybrid slot dictates its conditions. If you are critically important to the amount of internal memory and you plan to use a large microSD card, you will have to abandon the second SIM card.

It is also worth noting that frequency band support depends on the regional firmware version. Global versions of the Redmi Note 8 Pro usually have a full range of frequencies for Europe and Asia, while Chinese versions may differ in a set of supported 4G bands.

Solution: If the smartphone can’t see SIM-map

Despite Xiaomi’s reliability, users may find that the phone stops seeing one or both SIM cards, which can be a crossed-out SIM icon or a constant search for the network, and a series of software and physical checks are required before carrying the device into the service.

Often the problem is a software failure of the communication module, in which case a simple restart of the device or a flight mode switch helps, and if that doesn't work, try to remove the cards, wipe the contacts and insert them again, making sure that the position is correct. It is also wise to check the settings in the Settings point. → The phone. → All specs → Status SIM-map.

If the phone says "No Service" or "Emergency Calls Only", make sure the card is activated with the operator and there are funds on the account. Sometimes you need to manually configure the APN access points for the mobile Internet to work correctly, especially when using cards from regional operators.

• 🔄 Reboot your smartphone or turn on/off the “In the plane” mode".
• 🧹 Clear the contacts. SIM-cards and blow out the slot in your phone.
• ⚙️ Check if the lock is activated. SIM-maps in security settings.

⚠️ Note: If none of the cards are identified after resetting, the problem may be hardware (burnt communication module or plume.

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In most cases, the problem with determining the SIM is solved by a clean reinstallation of the card or restarting the device, less often you need to reset network settings.

Use a memory card instead of a second SIM

Since the Redmi Note 8 Pro doesn’t have a separate third slot, the choice between a second SIM card and a memory card is a compromise: 64 or 128GB internal memory may not be enough for the large number of high-resolution photos that this smartphone’s camera takes.

When you install a microSD card, it's defined as external storage, so you can set up your camera to keep all the new photos and videos on the map, freeing up internal space for the system and applications, so you can save two SIM cards for communication if one of the lines is rarely used, or you can sacrifice one number for gigabytes of memory.

The system allows you to format the memory card as an internal storage, binding applications to it. However, the speed of applications from the memory card is lower than from an internal flash drive, so this method is recommended to use only for storing media files and documents, but not for installing heavy games or instant messengers.

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