How to turn off incoming calls on Xiaomi Redmi 9

Modern smartphones like the Xiaomi Redmi 9 provide seamless connectivity, but sometimes users need a complete disconnect from the outside world.Whether it’s an important business conversation, time to relax, or just wanting to avoid intrusive offers from banks, blocking incoming calls becomes critical. Owners of devices based on the MIUI shell have several built-in accessibility management tools, each of which solves specific tasks.

In this article, we will take a look at all the methods available to temporarily or permanently block calls to your device, and we will look at both radical measures like air mode and the subtle system settings that allow you to skip calls from selected contacts, and understanding these mechanisms will help you manage your time and personal space effectively.

Use Do Not Disturb Mode to Filter Calls

One of the most flexible tools in Xiaomi's arsenal is the Do Not Disturb feature, which, unlike a simple turn off of the sound, allows you to set rules that determine who can reach you. To activate, go to Settings → Sound and Vibration → Do Not Disturb. Here you can set a schedule or turn on the mode manually.

Inside the settings menu, you need to pay attention to the Allow Calls section. By default, the system can skip calls from contacts from your phone book or recalls. If your goal is complete isolation, make sure that the value of "Nobody" is selected, which ensures that no incoming signal disturbs your peace, although notifications from applications can continue to come if they are not disabled separately.

It's important to note that Do Not Disturb does not block calls at the network level. The subscriber trying to call you will hear long horns, and your screen may flash a missed notification that will not make a sound, ideal for meetings or night time, when you need to keep the emergency communication through a repeat call.

• 📱 Go to the sound settings through the main menu screen.
• 🔇 Activate the Do Not Disturb switch for instant switching on.
• 📞 Set exceptions to skip calls only from loved ones.
• ⏰ Set an automatic schedule for the function to work at night.

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Use the Do Not Disturb widget on your desktop to quickly turn on the mode with a single touch, without going into the deep settings menu.

Radical method: flight mode and its features

If you want to cut off all incoming signals, including mobile network, Wi-Fi and Bluetooth, the best solution is flight mode. When you activate this feature, Xiaomi Redmi 9 completely breaks the connection with the operator's base stations, in which case the caller will hear the operator's standard message that the subscriber is unavailable.

You can activate this mode through the notification curtain by swiping from top to bottom and clicking on the icon of the aircraft. → SIM-maps and mobile networks → The main advantage of the method is absolute silence and no load on the radio module, which has a positive effect on the autonomy of the device.

⚠️ Warning: In flight mode, you will not be able to receive any calls and messages, including emergency calls.

A unique feature of modern smartphones is that they can use part of the mode. You can turn on the plane and then manually activate Wi-Fi. In this case, the Internet will work, but the cellular network will remain disconnected, and voice calls through the SIM card will not come, a popular scenario for those who want to use instant messengers, but do not want to hear the phone ringing.

Setting up a blacklist and blocking unknown numbers

The built-in protection against spam and unwanted contacts in MIUI is implemented through the Security app. It is a powerful tool that allows you to create blocking lists and customize rules for unknown subscribers. To access these features, open the Security application → Antispam → Blacklist.

Here you can add a specific number manually or select a contact from a phone book. More interesting is the lock-all-unknown number function. If you turn on the option "Block Hidden Numbers" or "Block Everyone Except Contacts," the phone will automatically drop calls from those who are not in your address book, which is an effective way to combat telemarketing.

When you lock the caller, you usually hear a short beep or a busy signal, and then the call is interrupted. In the call log, you can see a record of a blocked call if the log is enabled in the anti-spam settings. It is important to check this list periodically so that important numbers, such as couriers or doctors, are not accidentally blocked.

• 🛡️ Open the Security app on your desktop.
• 🚫 Add fraudster numbers to the blacklist manually.
• 🔒 Enable locking of all hidden and unknown numbers.
• 📝 Regularly check the log of blocked calls.

Call forwarding as a way to redirect calls

The redirect function allows you to redirect all incoming calls to another number or voicemail, and this is setup at the operator's network level, but is managed through the phone's menu. → Settings (three points or gears) → Call accounts → SIM-map → Redirection.

There are several types of forwarding: unconditional (all calls at once), when engaged, when no response is answered or when unavailable. To completely disable incoming, the most common use is unconditional forwarding to a number that does not exist or to a voicemail service. Once activated, your Xiaomi Redmi 9 will not call at all, since the network will redirect the call even before it reaches the device.

It is worth remembering that forwarding can be charged by the operator according to your tariff plan. If you redirect calls to another mobile number, minutes may be spent from your account.

Blocking specific contacts through the Phone application

To pinpoint individual subscribers, you don't have to go through complex system settings. Xiaomi's standard Phone app allows you to quickly log a number into an ignorant list directly from your call history, which is especially useful when you're worried about a particular person or organization.

The algorithm is simple: open a call log, find the number you want, and click on it (or the "i" icon next to it). In the menu that opens, select the "Block" option. From now on, all attempts to contact you from this number will be stopped at the device level, you will not even see a pop-up window during the call.

You can unlock the contact in the same blacklist settings that we mentioned earlier, and it allows you to create whole groups of locked numbers, and it creates a personal filter that only lets you through the desired communications and weeds out the stimuli.

Specificity of the two SIM-maps on Redmi 9

Redmi 9 supports two SIM cards at the same time, which makes its own adjustments to the lock process. Call settings apply separately for each SIM card. If you want to disable incoming, you need to make sure that the changes apply to both slots if you use both cards.

Settings menu → SIM-You can control each card independently, for example, you can turn off one SIM card programmatically without physically removing it, and you can switch the switch to the appropriate SIM card to the off position. This action instantly makes the number unavailable to the network, similar to turning off the phone, but only for one line.

This is a useful feature for splitting work and personal time, so you can turn off your working SIM card after 18:00, leaving your personal SIM active, and in this state, no one can call the work number, because the communication module will ignore the network requests for this slot.

• 📱 Use settings to manage each SIM card separately.
• 🔌 Software shutdown of the SIM card saves battery power.
• ⚙️ Check the redirect settings for both numbers.
• 🚫 Blocking in the mobile application “Phone” is global for all SIMs.

⚠️ Note: When software disabling SIM card incoming SMS They will also stop coming to this number until they are activated again.

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Software disabling the second SIM card is the most effective way to separate work and personal calls without having to carry two phones.

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