How to properly install SIM-Map Xiaomi Redmi 8: instructions with photos and videos

Why is the SIM in Redmi 8 a problem?

Xiaomi Redmi 8, released in 2019, has become one of the most popular budget devices due to the balance of price and functionality. SIM-maps (nano-SIM) + nano-SIM or nano-SIM + MicroSD is often confusing. Unlike flagships with separate slots, you have to choose between two SIMs or one SIM plus a memory card.

The main problems arise from:

• 🔧 Non-obvious slot location – it is hidden under the on button, and not on the sideline, as many competitors have;
• 📏 Format incompatibility – the slot only supports nano-SIM, and users try to insert micro-SIM or hand-cut;
• 📶 Network activation errors – after installing the SIM, the SIM is not detected due to improper orientation or damage to contacts.

In this article, we'll take a step-by-step photo instruction, tell you what tools you'll need, and warn you against common errors, and if you're planning on using a MicroSD, explain how to keep the second SIM ringing.

What will be needed for installation SIM-map?

Before you start, prepare everything you need. Without the right tools, you risk damaging the slot or the SIM card itself.

Mandatory set:

• 📱 Xiaomi Redmi 8 with a battery charge of at least 20% (in case of resetting network settings);
• 🪛 Paperclip or needle to extract the tray - comes complete with the phone, but any thin metal detail will do;
• 📇 Nano-SIM (or micro-SIM cropping adapter if you have an older format);
• 🔦 Lighting will help you see the slots on the tray.

In addition (if you are planning to use a microSD):

• 💾 MicroSD memory card (maximum supported volume - 512 GB, but optimally 128-256 GB for speed of operation);
• 🔄 Data portability adapter – if you need to copy files from an old SIM.

Importantly, if you're using a MicroSD, you'll have to consider that the second SIM won't work, it's a hybrid slot, and you'll have to choose between the extra memory and the second network.

⚠️ Warning: Do not use plastic or wooden objects (toothpicks, matches) to retrieve the tray. They may break inside the slot, and you will have to disassemble the phone to retrieve the debris.

Where is the slot for SIM-maps in Redmi 8?

Unlike most smartphones, where the slot is located on the upper or side edge, in Redmi 8 it is hidden under the on button on the right end.

How to find him:

1. Take the phone in the right hand with the power button up.
2. Look at the small hole below the button – this is the slot for the paper clip.
3. Light up with a flashlight, you can see a metal ring inside.

If you can't see the hole, you may have a case on your phone, so you don't damage the material when you remove the tray.

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Before removing the tray, place the phone on a soft surface (such as a towel) if it slips out of your hands, it will prevent damage to the screen.

Step-by-step instruction: how to insert SIM-map in Redmi 8

Now, to the process itself, follow the instructions in strict order to avoid errors.

Step 1: Removing the tray

Insert the paperclip into the hole next to the power button and press until the click. The tray should extend 1-2 mm. Carefully pull it with your fingers - do not apply force so as not to break the latch.

If the tray doesn't come out:

• 🔄 Check that the paperclip has gone in to the point;
• 🔧 Try to swing it left-right;
• 📞 Don’t use force – go to the service center.

Step 2: Installation SIM-map

So you look at the tray, and it has a diagram of where and how to insert the SIM, and there are two options for Redmi 8:

• 📱 Two nano-SIMs are installed in slots 1 and 2 (contacts down);
• 📱💾 One nano-SIM + MicroSD - SIM in groove 1, memory card in groove 2.

The SIM contacts should be directed towards the screen (not the back cover!) If you confuse it, the phone won't see the map.

Step 3: Returning the tray to its place

Carefully insert the tray back into the slot before the click. Make sure it sits flat - if there is still a gap, the SIM will not work. After installation, turn on the phone (if it was turned off) and wait for the network to activate.

Common Mistakes and How to Avoid Them

Even with the seemingly simple process, users often make mistakes that lead to loss of communication or damage to the phone.

Mistake 1: Symka is not defined

Causes and solutions:

• 🔄 Incorrect orientation – turn the SIM with contacts to the screen;
• 🧹 Dirt in the slot - clean the grooves with a dry toothpick (do not use alcohol!);
• 📵 Inactive SIM – Check balance or contact the operator;
• 🔧 Damaged tray – if the contacts are bent, you need a replacement.

Mistake 2: Phone says "No network"

This may be related to:

• 📡 Network settings – go to Settings → SIM-maps and mobile networks → Selecting a network and selecting an operator manually;
• 🔄 Software failure – restart your phone or reset your network settings in Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth;
• 📶 Operator problems – check network coverage in your area.

⚠️ Warning: If the phone stopped seeing MicroSD after installing the SIM, check if the memory card in the slot has moved. Sometimes it "gets out" when the installation is not neat.

How to activate the second SIM-map?

If you have two SIMs installed, you need to set them up correctly. By default, Redmi 8 can only use one card for mobile internet, and the second will only work for calls and SMS.

Setting priorities:

1. Go to Settings → SIM-cards and mobile networks;
2. Choose a Name. SIM-cards and give each a convenient name (for example, "Worker" and "Personal");
3. In the Mobile data section, specify which SIM will be used for the Internet;
4. In Call Settings, select the SIM for the outgoing defaults.

Important nuances:

• 📞 Calls can be made to both SIMs at the same time, but SMS Only the one that is active for data;
• 🌐 If you turn on mobile Internet on both sims, traffic will be spent only with priority;
• ⚡ When the Internet is active on one SIM, the second can automatically turn off to save charge.

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Redmi 8 can’t use mobile internet from two sims at the same time, so if you want this feature, consider models that support Dual 4G (for example, Redmi Note 10).

Frequent questions from users