How to properly install SIM-Xiaomi Redmi 9 maps: a guide with photos and secrets

Xiaomi Redmi 9 remains one of the most popular budget devices due to balanced performance and support for two devices. SIM-But even a simple process like installing a SIM can raise questions for a beginner: Where is the tray? Which side is the nano-SIM inserted? Can you use a microSD with two SIM cards? These and other nuances we will analyze in detail – with photos, warnings about typical errors and life hacks to save time.

Unlike flagship models, where card slots are often placed on the top, Redmi 9 has a traditional tray on the left end of the case, but even here there are pitfalls: improper removal of the tray can damage the mechanism, and improper installation of SIM will lead to a lack of network, we will show how to avoid these problems and set up mobile communication in 5 minutes.

If you’ve just purchased a Xiaomi Redmi 9 or are considering a change of operator, this guide will save you time and nerves. And for those who like details, at the end of the article, you’ll find a comparative table of formats. SIM-map FAQ non-obviously.

Preparation for installation: what will be needed

Before you start the installation, make sure you have everything you need.

• 📱 Xiaomi Redmi 9 (Switched off or in flight mode)
• 🪨 Paperclip or special key for extracting the tray (comes complete)
• 📇 Nano-SIM card(s) from your carrier (cut to the right size)
• 💾 MicroSD card (optional if you plan to expand your memory)

Redmi 9 supports a hybrid slot, meaning you can use either two nano-SIMs or one nano-SIM. + microSD: You can't have two SIMs and a memory card at the same time, it's a hardware limitation. If you want both SIMs and additional memory, consider cloud storage or a storage device. OTG-accumulator.

Before removing the tray, be sure to turn off the phone or put it into flight mode, this will prevent possible malfunctions in the modem when hot card change. SIM-card no protected contacts - their damage can make the SIM inoperable.

Where is the slot for SIM-maps in Redmi 9

In Xiaomi Redmi 9, the card tray is located on the left end of the case, about half the height of the smartphone. It is easy to identify from the small hole next to it, this is a clip connector. If you hold the phone with the screen to yourself, the slot will be on the left, just below the volume buttons.

🔍 How not to confuse a slot with a microphone or speaker?

• 🎤 The microphone in Redmi 9 is on the lower edge next to the connector. USB-C.
• 🔊 The speaker is located there, but occupies a large area and has a grid.
• 📶 Slot for SIM — This is the only hole on the left side, except for the volume buttons.

If you can't find the tray, you may have a case on your phone that covers the hole. Take off the case and look around the body again. Also note that some Redmi 9 versions (like the Redmi 9A or Redmi 9C) may have different slot locations — but that's what the base Redmi 9 model does.

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If the paperclip doesn't go into the hole, don't force it! You may have hit the wrong place. Light the left face with a flashlight - the hole to extract the tray should be visible as a small dot (≈1 mm in diameter).

Step-by-step: how to remove and install the tray

Now, to the process itself, follow the instructions carefully so that you don't damage the tray mechanism.

1. Turn off your phone or put it in flight mode (press and hold the power button → select “Flight Mode”).
2. Put the paper clip in the hole on the left side, all the way up, and you'll feel a slight click, which means that the tray has unlocked.
3. Carefully pull the tray over the gap that appears. Don't pull it sharply - there's a spring mechanism inside.
4. Place the tray on a flat surface (like a table) and examine it. It should have a mapping pattern.

📌 The tray scheme in Redmi 9:

If you set two SIM-Place the cards according to the diagram: the first SIM in the top slot, the second in the bottom slot. If you want a memory card, place it in the bottom slot instead of the second SIM card.

Make sure the phone is turned off

Check the integrity of the contacts SIM-map

Place the cards according to the scheme on the tray

Make sure the microSD is inserted with gold pins down

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Attention! Don't try to insert microSD into a nano-SIM slot, because the sizes are incompatible, and don't use adapters or trimmings of standard SIMs, because it can damage the contacts inside the phone.

How to insert it correctly SIM-map: side and position

One of the most common questions is which side to insert SIM-The card in Redmi 9 is a simple rule: the gold contacts should be directed downwards, and the beveled angle should coincide with the beveled angle on the tray.

🔹 Step-by-step accommodation:

📸 Visual clue:

In Redmi 9, the tray doesn't have a microSD locker -- the memory card only holds up because it's tight, so if the phone doesn't see the microSD after you install it, remove the tray and check if the card drops out when you insert it.

Activation. SIM-maps and network settings

Once you have the cards installed, turn on your phone. If done correctly, mobile network indicators (e.g., 4G or LTE) will appear in the status bar, but sometimes you need to adjust the following:

🔧 What to do if the network does not appear?

• 🔄 Restart your phone – sometimes the modem doesn’t initialize the first time.
• 📶 Check if mobile data is enabled: go to Settings → SIM-Maps and mobile networks and activate the switch.
• 🔍 Make sure that SIM-The card is activated by the operator (especially if it is new).
• 📞 Call from another phone to this number – if the call passes but there is no internet, check your settings APN.

📡 Setting up APN (point):

1. Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Access points (APN).
2. Click Add APN and enter your operator’s options (they can be found on the official website).
3. Save the settings and restart the phone.

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Attention, if after installation SIM-The phone is making an error "SIM-Not supported, check: Is the card of another operator inserted into a slot tied to a particular network (e.g., in some versions of Redmi 9, the first slot is optimized for the first slot). 4G). Whether damaged SIM-card (scratching contacts, cracks) is not the phone locked for a specific operator (if you bought on credit or on a stock).

Frequent Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes when installing SIM-Here are the most common ones and the ways to solve them:

🛠️ If the tray broke:

If the tray extraction mechanism is damaged (for example, the spring popped out), do not try to repair it yourself - this can lead to dust getting inside the case. Contact the Xiaomi service center or order a replacement tray (cost - from 500 rubles).

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After installation SIM-The phone is overheating or running out quickly, so take the card out and check it on another device. SIM It can cause a modem malfunction.

Compatibility with operators and features of 4G

Xiaomi Redmi 9 supports the work with most Russian operators, but there are nuances that you should know about:

📡 Network support:

• 🌐 4G (LTE): both slots support 4G, but at the same time 4G Only one slot can be used (the second one switches to the second one). 3G/2G).
• 📞 VoLTE: Supported but requires activation in settings (Settings) → SIM-map → [choose SIM] → Voice communication through 4G).
• 🔄 Network switching: if the signal 4G The phone automatically switches to the weak 3G/2G.

📶 Recommendations for choosing a slot for 4G:

If you care about internet speed, put the main one. SIM-card (SIM (1) It shall have priority for 4G-The second slot (SIM 2) better used for calls or backup SIM.

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Attention! Some Redmi 9 firmware (especially custom ones) may not support VoLTE. Check with the operator before buying if this feature is required for their network.

FAQ: Answers to Frequent Questions