How to properly disable SIM-Map of Xiaomi Redmi 9: All ways + frequent

Shutdown SIM-Xiaomi Redmi 9 cards can be needed in a variety of situations: from saving battery power to temporarily switching to another operator. However, many users face unexpected difficulties — for example, the phone continues to catch the network even after the “disconnection” in the settings, or suddenly loses access to the mobile Internet. SIM, including hidden nuances for models with two physical slots and hybrid support for eSIM.

It’s important to understand that Redmi 9 (codenamed lancelot) has the ability to manage SIM cards depending on the version of MIUI firmware. For example, in global builds, the path to settings may differ from the Chinese versions. We took all these points into account and prepared universal instructions that will work regardless of the regional firmware of your device.

1.Switch off. SIM-cards via notification panel (quick method)

The easiest method is to use the Quick Settings Panel, which is suitable if you need to temporarily disconnect the network without completely removing the SIM card from the system.

Steps:

• 📱 Swipe down from the top edge of the screen to open the notification bar.
• 🔍 Find the Mobile Data icon (usually displayed as two arrows up/down).
• 🖱️ Press and hold this icon. 1-2 Seconds – Extended settings of the mobile network will open.
• 📵 At the top of the screen will appear a switch for each SIM-Turn off the right one by moving the slider to the left.

⚠️ Note: This method does not disable SIM-card in full – the phone will still see it in the system (for example, for receiving) SMS). To completely deactivate the SIM, use the methods in the following sections.

2. Completely disabling SIM through phone settings

If you need to completely deactivate SIM-Use this method, which works for both physical SIMs and eSIMs (if your model supports virtual cards).

Instructions:

1. Open the Settings app (cog icon).
2. Go to section. SIM-Maps and mobile networks (or dual networks) SIM and mobile network in some firmware).
3. Choose. SIM-The card you want to disable (click on its number or operator name).
4. At the top of the screen, find the switch "Enable this one" SIM-"Card" and move it to the off position..
5. Confirm the action if a request appears.

After that, the phone will stop using this SIM card for calls, SMS and mobile Internet, but the card will remain in the slot and will consume a minimum battery charge (about 1-2% per day) due to the background activity of the communication module.

Keep important contacts with SIM-phonebook

Check your mobile account balance (when disabled, some operators block access to services)

Turn off mobile internet autopayment (if used)

Make sure the second one is SIM-The card is active (if you plan to use it)-->

3. Physical extraction SIM-maps: when necessary

In some cases, software shutdowns fail because of a communication module or firmware malfunction, so you just have to physically remove the SIM card from the tray, and this method is also useful if you want to:

• 🔄 Replace SIM-card to another (for example, with a different tariff).
• 🛡️ Completely eliminate the possibility of tracking IMSI (for example, on the road).
• 📶 Resolve the conflict between two SIM cards (if the phone does not catch the network on one of them).

How to extract SIM-map from Redmi 9:

1. Turn off your phone (required! Removal when power is on can damage your contacts).
2. Find a tray for SIM-cards on the left side of the device (near the volume button).
3. Insert a paper clip or special key into a small hole next to the tray to push it out.
4. Take the tray out carefully, remove it. SIM-The card and insert it back (you can leave it empty).

⚠️ Note: If you are using a hybrid slot (SIM + microSD, and when you remove the SIM card, it automatically shuts down the memory card, and to make it work, you have to restart the phone.

4.Switch off SIM-Maps via Engineer Mode (for experienced users)

If standard methods don’t work (for example, due to a firmware failure), you can use the engineering menu, which is only suitable for confident users, since improper actions can disrupt the communication module.

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. In the menu that opens, select Phone Information (or Phone Information).
3. Scroll down to the "Set preferred network type" block.
4. Find a drop-down list with your name SIM-maps, for example, SIM1 or SIM2) and select Disable.
5. Confirm the action and restart the phone.

⚠️ Attention: In some firmware MIUI If the combination ##4636## does not work, try the alternative code:

##36446337##

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If after the shutdown SIM-cards through Engineer Mode phone stopped catching the network on the second SIM, reset the mobile network settings in the Settings section → SIM-maps and mobile networks → Resetting settings.

5. Features of working with two SIM-maps on Redmi 9

Xiaomi Redmi 9 supports two nano-SIM cards at the same time (or one SIM + microSD in a hybrid slot).

• 📶 Network priority: If both SIMs are active, the phone defaults to mobile Internet using the one listed as "Major" in the settings. If you turn off the main SIM, the Internet will automatically switch to the second one (if it supports data transfer).
• 🔄 Auto-switching: In settings SIM-maps and mobile networks → Double. SIM You can turn on the option Automatic data selection – then the phone will use the SIM that has better coverage.
• 📞 Calls and SMS: The SIM card will not receive calls, but SMS They can be used in the background (depending on the operator).

If you notice that after disabling one SIM, the second one started to work unstable (for example, 4G disappears), check the settings of the preferred network type:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose an active one SIM-map.
3. Click Network Type and install 4G (preferably).

6. Frequent mistakes and how to avoid them

Many users face typical problems when disconnecting SIM-Redmi 9 cards, and here are the most common ones and the ways to solve them:

• 🔌 "SIM card is disabled, but the phone still catches the network": This happens if you turn off only mobile data, but not the SIM itself. Go to Settings → SIM-Deactivate the card completely and completely.
• 🔋 "After extraction SIM-Cards quickly go down battery": Probably the phone is constantly scanning the network for missing SIM.Solution - disable Network Search option in mobile settings.
• 📵 "Mobile Internet is down after the second SIM is turned off: Check if the SIM that was disabled was the main one for data transfer. → SIM-map → Mobile Internet and assign the main other SIM.

Another common mistake is the use of unoriginal trays for SIM-Cheap Chinese counterparts can not fix contacts poorly, which will cause the phone to "lose" the SIM. If after extracting / pasting the card, the network disappears, try it:

1. Wipe the contacts of the SIM card and tray with an alcohol napkin.
2. Carefully bend the contacts in the tray (if they are bent).
3. Replace the tray with the original one (Article for Redmi 9 - MDY-11-ES).

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If after all the manipulations the SIM card does not turn off, check whether the function "Modem Mode" or "Access Point" is activated - in this case, the phone forcibly keeps a connection to the network.

7.Alternative methods: Disconnection through ADB and third-party applications

For advanced users, there are additional ways to manage SIM-cards that may be useful in non-standard situations (for example, when the interface fails) MIUI).

Method 1: Disconnecting through ADB

If you have access to ADB (Android Debug Bridge), you can disable the SIM by command:

adb shell am broadcast -a android.intent.action.AIRPLANE_MODE --ez state true


adb shell settings put global airplane_mode_on 1




adb shell am broadcast -a android.intent.action.AIRPLANE_MODE --ez state false




adb shell settings put global airplane_mode_on 0

This sequence simulates the on/off mode "In the plane", which leads to reset connections to the network, after execution of commands, the SIM card will be deactivated until the next reboot.

Method 2: Applications for SIM management

Google Play has utilities that allow you to flexibly configure the work of SIM cards, for example:

• SIM Card Manager – Disable/switch SIMs in one click.
• Dual SIM Toggle is a widget for quick dual SIM management.
• Network Signal Guru – Monitoring the status of the network and forced shutdown.

⚠️ Note: When using third-party management applications SIM-With cards, turn off battery optimization for them in the phone settings, otherwise the system may force them to close, and the SIM is activated again.

FAQ: Answers to Frequent Questions