Replacement SIM-Xiaomi Redmi 8: instructions with photos and tips

Shift. SIM-The cards on the Xiaomi Redmi 8 smartphone are a procedure that almost every owner faces: someone switches to a new operator with a better tariff, someone needs to temporarily use a second SIM, and some just want to move the number to a new chip. Despite the apparent simplicity, the process has nuances: from the correct extraction of the tray to setting the priority of networks.

In this article, we will discuss all the ways to switch. SIM-map 8, This includes working with a hybrid slot, activating eSIM (if supported), and solving typical problems, from the “No Network” error to conflicts between SIMs. 4G/5G.

If you have never opened a slot for SIM Xiaomi, don't worry: the Redmi 8 design provides a convenient extraction mechanism, and the risk of damage to the device is minimal if you follow the instructions.

At the end of the article you will find FAQ Answering frequent questions, including operator compatibility, the difference between nano-SIM and micro-SIM, and tips for optimizing two SIM cards at the same time.

Preparation for replacement SIM-maps: what you need to know

Before you remove the tray, make sure you have everything you need. For Xiaomi Redmi 8, you will need:

• 🔑 Key to extract the tray (goes with the phone; if lost - a paper clip will fit, but carefully!).
• 📱 New SIM-nano-SIM map (12.3×8.8 Redmi. 8 Does not support micro-SIM or standard SIM adaptless.
• 📡 Network coverage check: If you are switching to a new carrier, make sure it supports your region’s frequencies (e.g., for the first time). 4G in Russia - Band 7/20/38).
• 🔋 Battery charge at least 20%, when the new battery is first activated SIM phone can reboot.

Redmi 8 is equipped with a hybrid slot, meaning you can use either two nano-SIMs or one. SIM + microSD card (up to 512 GB) at the same time two SIM and flash drive do not work - you have to choose.

If you are planning to use two SIM-Check the cards and check their compatibility:

• 📶 Both SIMs support 4G, but simultaneously 4G Only one can work (the second one will switch to the second one). 3G/2G).
• 🔄 Network priority is set up manually (more on this below).
• 🚫 Some operators (e.g, Tele2) They can block the second job. SIM roamingly.

Step-by-step instructions: how to remove and insert SIM-map

The process of replacing the SIM with Redmi 8 takes no more than 2-3 minutes, according to the algorithm, the main thing is not to make excessive efforts when removing the tray, so as not to damage the mechanism.

Here's how to do it right:

1. Turn off the phone (optional, but recommended for safety) Press the power button and select Turn off.
2. Find a slot for SIM. On Redmi 8, it is located on the left side of the screen (if you look at the screen).
3. Put the key in the hole before you click. The tray will extend 2-3 mm - gently pull it with your fingers.
4. Remove the old one. SIM (If you have one, you can place a new one. Notice the notch, it should match the shape of the slot.
5. Put the tray back in before you click. Make sure it sits smoothly, without skewing.
6. Turn on the phone and wait for the network to activate (it can take up to 2 minutes).

If the tray is not removed:

• 🔧 Check that the key is inserted perpendicular to the body, not at an angle.
• 🛠️ Don't push too hard, the mechanism may jam. Try to shake the key left-right slightly.
• 📞 If the tray is stuck, do not try to pull it out with tweezers - contact the service center.

Turn off the phone (recommended)

Check the new format SIM (nano-SIM)

Find the key to retrieve the tray

Ensure coverage of the new operator’s network

Take a picture of the settings APN (If you move to another operator)-->

Attention, if after the replacement SIM The phone doesn't see the network, check it:

• Is the card inserted correctly (the notch should match the shape of the slot).
• Activated? SIM Operator (sometimes a hotline is required).
• Is flight mode enabled (Settings) → SIM-maps and mobile networks).

Setting up SIM-card-on-card

After installing a new one SIM-Redmi 8 cards can automatically determine network settings, but sometimes manual configuration is required:

1. Priority SIM-call-cards and the Internet

The phone uses the first SIM for calls and SMS, But you can change that:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select Priority SIM-Call cards and indicate your preferred.
3. For mobile Internet, tap Mobile Data and select SIM.

2.Tune in. APN (point)

If the internet is not working, check the APN settings:

1. Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Access points (APN).
2. Click Add and enter your operator's details. For example, for MTS: Name: MTS APN: Internet.mts.ru Username: mts Password: mts
3. Save and restart the phone.

3. Inclusion 4G/VoLTE

To use high-speed internet:

• Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Type of network.
• Choose. 4G (recommended 3G/4G (motor-car).
• For calls on 4G (Enable the option of high quality calls in the same menu.

💡

If, after the replacement, SIM phone does not catch the network, try to manually select the operator: → SIM-map → [choose SIM] → Network operators → Manual search. Sometimes automatic fails.

Working with two SIM-maps: nuances and optimization

Xiaomi Redmi 8 supports Dual SIM Dual Standby (DSDS), Both SIMs are active at the same time, but with limitations:

• 📞 Calls: If you are talking one at a time SIM, The second will be unavailable for incoming calls (they will be forwarded to voice mail).
• 🌐 The Internet: Only one SIM It can use mobile data. The second one will be in mode. 2G/3G call-in.
• 🔄 Switching: to change SIM For the Internet, you need to manually select it in the settings.

How to optimize the work of two sims:

1. Assign tags: in Settings → SIM-cards can be given a name for each SIMKA (e.g., "Worker" and "Personal").
2. Set up notifications: Turn on the option to Show the mobile data icon to see which one is SIM active.
3. Use fast switches: Add Mobile Data and Flight Mode tiles to the notification curtain for quick control.

Table: Operator compatibility for Dual SIM Redmi 8

Frequent mistakes and their solution

Even with the right installation SIM-Here are the most common problems on Redmi 8 and how to fix them:

1. “No network” or “Emergency calls only” error

• 🔄 Reboot your phone – it solves 70% of connection problems.
• 📡 Check the network mode: if only selected 4G, If there is no coverage, switch to 3G/2G.
• 🔧 Reset network settings: Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.

2.The phone doesn't see the second SIM-map

• 🔍 Make sure the tray is inserted to the end (sometimes it seems fixed, but the contacts do not touch the tray). SIM).
• 🛠️ Check if the contact in the slot is bent (take it with a needle carefully if necessary).
• 📱 Update: In older versions MIUI There were bugs with the second recognition SIM.

3.The mobile internet is not working on the new SIM

• 📝 Check the settings. APN (Often, operators send them automatically to the SMS.
• 🔄 Switch the data transfer mode from "4G" on "3G" back and forth.
• 💳 Make sure you have enough money in your account (some operators block the Internet with zero balance).

⚠️ Attention, if after the replacement SIM your phone has stopped seeing both SIMs, don't try to retrieve the tray, it could damage your contacts.

Switching to eSIM: Is it possible to use Redmi 8?

Unfortunately, the Xiaomi Redmi 8 does not support eSIM, either hardware or software, and this feature only appeared in newer models (for example, the Redmi Note 11 Pro).+ 5G Xiaomi 12).

If you need a virtual chip, consider the following options:

• 📱 Buy a new smartphone with eSIM support (e.g. Xiaomi 13 Lite or POCO F5).
• 🔄 Use an adapter: Some operators (such as MTS) offer physical SIM-eSIM cards, but they are not a complete replacement.
• 🌐 Connect a virtual number through apps like Google Voice or Dingtone (but it won’t replace the main one). SIM).

If you still want to try to circumvent the restriction, there are informal methods with custom firmware, but they are:

• 🚫 Deprived of guarantees.
• 🔧 Requires unlocking the bootloader and technical skills.
• 🐞 This can lead to unstable network operation.

⚠️ Buying the Chinese version of the Redmi 8 (for example, for the Indian market) does not add support for eSIM - this is a hardware limitation of the model.

Safety Tips for Replacement SIM

Replacement SIM-Maps are not just a technical process, but also a matter of security for your data:

1. keep contact and SMS

• 📱 Export contacts to Settings → Google → Backup → Contacts.
• 💬 For SMS Use applications like SMS Backup & Restore.
• 🔐 If you use two-factor authentication (2FA) down SMS, Reconfigure it to a new device before replacing it SIM.

2. verify the authenticity of the new SIM

• 🛡️ Buy it. SIM-cards only in official salons of the operator or verified points of sale.
• 🔍 Compare the number. IMSI new SIM with operator data (you can find out by command *#06# → Settings → The phone. → Status SIM-map).
• 🚨 If, after activation of a new SIM You come. SMS Asking for personal information is phishing!

3. Set up lockdown. SIM-map

To protect the SIM from unauthorized use:

1. Go to Settings. → Security → Lockdown SIM-map.
2. Turn on the option and install it. PIN-code (default: 0000 or 1234).
3. Write it down. PIN Safe place (don’t keep it on your phone!).

💡

Always check the coverage of the new operator's network before replacing it. SIM. For example, if you are moving from MegaFon to Tele2, Make sure that in your area Tele2 supportive 4G on the frequencies that are available in Redmi 8 (Band 3/7/20).

FAQ: Answers to Frequent Questions