How to insert a SIM card in Xiaomi Mi 9: tray, tools and life hacks

Xiaomi Mi 9 – the flagship of 2019, which still remains relevant thanks to powerful “iron” and regular updates MIUI. Even experienced users sometimes have trouble installing SIM-maps: where the tray is, what tool to use, how not to damage contacts. In this article, we will discuss the process from A to Z, from choosing a SIM card to solving network recognition problems.

The Mi 9 features a hybrid slot: either two nano-SIMs or one nano-SIM+ MicroSDs. This means that when you install the second SIM, you lose the ability to expand your memory, and we will explain how to optimally allocate the slots and avoid common mistakes, such as improper trimming of the SIM card or damage to the tray.

This article is relevant for all Xiaomi Mi 9 modifications, including Global ROM and Chinese ROM. If you have another model of the series (for example, Mi 9 SE or Mi 9T), the process may be different – check the specifications of your device.

What kind of SIM card supports Xiaomi Mi 9?

Smartphone Xiaomi Mi 9 It works exclusively with nano-SIM (format) 4FF, 12.3 × 8.8 Use of adapters or trimming of standard SIM-If you don't already have a nano-SIM, contact the operator for a replacement, which is free in most salons.

It is important to note that the Mi 9 supports Dual SIM in DSDS mode, which means that both SIM cards are active at the same time, but while talking on one of them the second will not be available.

• 📶 4G LTE (up to 1.2 Gbps on the main SIM card)
• 📞 VoLTE (voice calls through the 4G, if the operator supports)
• 🌐 3G/2G (switching-off 4G)

If you plan to use a MicroSD, remember: the slot is hybrid. This means that when you install a memory card, you will only be able to insert one SIM card. Officially, the Mi 9 supports a MicroSD up to 256 GB (FAT32 or exFAT format).

⚠️ Note: Some users have reported problems with the recognition of microSD with a capacity of more than 128 GB on the Chinese versions of firmware. If the card is not identified, try formatting it into a new format. FAT32 computer.

Where is the SIM card tray in Xiaomi Mi 9?

In the Xiaomi Mi 9, the SIM card tray is located on the left side of the device (when you look at the screen), it is easy to recognize by the small hole to extract. Some models have a barely noticeable SIM card icon next to the hole.

To avoid confusing the tray with other connectors (for example, with a USB-Type C or 3.5 mm for headphones, which is not in the Mi 9), focus on:

• 📍 Location: approximately in the middle of the left end, closer to the top.
• 🔍 Appearance: small circular hole diameter ~1 mm.
• 🚫 What is not near: unlike Mi 9T, There is no retractable mechanism for the front camera.

If you can't find the tray, you may have a case or film on your device that covers the hole. Carefully check with your finger, the hole should be felt as a small recess.

What tool is needed to remove the tray?

To extract the tray of SIM cards in Xiaomi Mi 9 uses a special key (clip for SIM card), which comes with the phone. If you lost the original tool, alternatives are suitable:

• 🔧 Paperclip or pin: unwind the paperclip so that a straight end is obtained. ~3cm.
• 📌 Needle or toothpick: a thin needle from a syringe or a pointed toothpick will fit (carefully so as not to break!).
• 🔨 Special keys: in electronics stores sell universal keys for sim trays (costs) ~50-100 ruble.).

What can't be used:

• ❌ Knives, scissors, screwdrivers - they are too thick and can damage the mechanism.
• ❌ Pencil, pencils – graphite or plastic can crumble and clog the hole.
• ❌ Too thin objects (such as wire) that bend when pressed.

If you're afraid of damaging your phone, you can go to Xiaomi's service center, where they can help you get the tray out for free, but it takes time, so you better learn how to do it yourself.

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Before removing the tray, turn off the phone or put it in flight mode, which will prevent accidental taps on the screen and reduce the risk of damage to contacts when installing the SIM card.

Step-by-step: how to insert a SIM card in Xiaomi Mi 9

Now, let's get to the process itself. Follow the instructions carefully to avoid the typical mistakes.

1. Turn off your phone. This is not necessary, but it is recommended to avoid any failures in SIM recognition. If the phone is on, put it in flight mode.
2. Find the opening to extract the tray. As we wrote earlier, it's on the left end. Hold the phone up to the light to get a better look at the hole.
3. Put the key in the hole. Press until the tray is pushed 1-2 mm. Don't be afraid to press hard, the mechanism is designed for this.
4. Remove the tray completely. Pull it carefully with your fingers. Don't pull the key, so you can bend the tray.
5. Place the SIM card(s) in the tray. Notice the notch on the tray, it must match the notch on the SIM card. 9 rule: 📱 Slot 1 (upper: main nano-SIM (supports) 4G/VoLTE). 📱 Slot 2 (Lower: second nano-SIM or MicroSD.

Put the tray back in.

Make sure the SIM cards don't protrude beyond the edges of the tray. Plug in before you click, which means the tray is locked.

Turn on your phone and check the network.

After downloading, check the network indicator in the status bar. If the SIM card is not recognized, restart the device.

Is the phone turned off or flight mode turned on?|

Is there a notch on the SIM card that matches the tray?|

Do not the edges of the SIM card extend beyond the slot?|

Whether you use the original key or a suitable alternative?-->

Important: If you install a MicroSD, format it only through your phone after the first insert. Formatting on a PC can lead to incompatibility with MIUI.

Typical problems and their solutions

Even with the right SIM card installation, there can be problems, and let's look at the most common ways to fix them:

1.The phone doesn't see the SIM card

If the SIM card is not recognized after installation:

• 🔄 Reset your phone. MIUI Not immediately identify a new SIM card.
• 📶 Check the network coverage. It may not be the phone that's the problem, but the operator (e.g., a station crash).
• 🛠️ Clean the contacts. Wash the SIM card and tray contacts with dry soft cloth (e.g. microfibre).
• 🔧 Check compatibility. Make sure that the SIM card is activated and supports your operator’s networks (e.g. MTS, Beeline, Tele2 or MegaFon).

2. The tray is not fixed or falls out

If the tray does not click when installing:

• 🔍 Check the SIM card. It's probably crooked or protruding beyond the edges.
• 🛑 Don't push too hard. If the tray doesn't come in, don't apply excess force, so you can break the mechanism.
• 🔧 Use another key. Your tool may be too thin or too thick.

⚠️ Warning: If the tray is jammed inside the phone, don't try to remove it yourself - it could damage the motherboard.

3.The second SIM card is not working.

If the first SIM card works and the second does not:

• ⚙️ Check the settings. Go to the settings. → SIM-Maps and mobile networks and make sure the second SIM card is activated.
• 📶 Set network priority. In the same settings, select which SIM card to use for data, calls and calls. SMS default.
• 🔄 Switch the SIM cards around. Maybe the problem is the slot. Try swapping the SIM cards around, because if the second one works in the first slot, the hybrid slot is broken.

How to choose a SIM card for Xiaomi Mi 9: tips

Not all SIM cards work equally well with the Xiaomi Mi 9. Here’s what to look for when choosing:

• 📡 Support 4G/VoLTE. Check with the operator whether your SIM card supports voice calls through the phone. 4G (VoLTE. This is especially important for Mi. 9, It is optimized for the next generation of networks.
• 🔄 Fare with unlimited Internet. Mi 9 supports high speeds LTE (up to 1.2 Gbps), so unlimited tariff will help to unlock its potential.
• 🌍 If you travel frequently, choose a SIM card with favorable roaming conditions (for example, the rates "Like at home" from MegaFon or "No Borders" from MTS).
• 📱 eSIM (not supported) Xiaomi Mi 9 doesn't have an eSIM slot, so don't buy tariffs tied to an electronic SIM card.

If you are planning to use two SIM cards, consider that:

• The main SIM card (slot 1) will have priority for 4G.
• The second SIM card (slot 2) can only work in 3G/2G if the first one uses 4G.
• If you actively call one SIM card, the second one will not be available (DSDS restriction).

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If you travel frequently, consider a tariff that supports Dual SIM + roaming. For example, in the Mi 9 you can install a local SIM card in slot 2, and leave the main one in slot 1 for receiving SMS and calls.

Frequent questions about SIM cards in Xiaomi Mi 9