How to set up call forwarding on Xiaomi Redmi 9

Modern smartphones like Xiaomi Redmi 9 provide users with a wide range of incoming call management options, allowing them to flexibly configure call handling scenarios. In situations where you are out of range, busy with an important conversation, or simply unable to answer, the automatic redirect function becomes an indispensable tool for maintaining business communication. Properly configuring this option ensures that no important call from a customer or a loved one is lost, even if your phone is off or in flight mode.

In the operating system MIUI, Based on Android, the call redirect activation process can be implemented in several ways, each of which has its own characteristics. You can use the standard graphical menu of the phone settings, which is most convenient for visual control, or apply special options. USSD-Understanding the differences between these methods will allow you to choose the most suitable option for a particular situation and quickly adapt the device to your current needs.

In this article, we will discuss in detail all available ways to activate redirects to Redmi 9, paying special attention to the nuances of working with different types of redirects. SIM-We will look at how to configure unconditional forwarding and conditional forwarding, and discuss the possible challenges users face when trying to change standard voice settings. This guide will help you take full control of your smartphone’s incoming traffic.

The main types of call forwarding to Android

Before you start technically configuring your Redmi 9, you need to be clear about what types of call forwarding exist and what life scenarios they should be used. The standard GSM protocol used by most mobile operators supports four main modes of operation, each of which is activated independently and has its own triggers. The confusion in these definitions often leads to users turning on the wrong feature they needed, which causes frustration and loss of important contacts.

The first and most radical type is unconditional redirection, which redirects all incoming calls to another number immediately after the signal arrives, without even giving your phone the opportunity to call. This mode is ideal for situations where you are in a bad reception zone or plan to not use the device for a long time, but want callers to be able to contact your assistant or second phone.

The rest of the redirects are conditional and only activate when certain events occur, such as line employment or response time expires. Redirects during busy times will work if you are already talking to someone on the second line or manually reject a call, whereas forwarding in the absence of a response will take effect if you do not have time to pick up the phone in the specified time (usually 15-30 seconds).

• 📞 Always redirect: All calls go to another number instantly, your phone doesn't ring.
• ⏳ When you are busy: the call is translated if you are already on the phone or have dropped a call.
• ⏰ If there is no response: Redirects will work if you do not respond within a given time.
• 📶 Inaccessible: Works when the smartphone is turned off, in air mode or without a network.

⚠️ Note: When using unconditional forwarding, your phone may stop displaying missed calls in the log, as they will be considered successfully completed on another number. Be careful when activating this mode so as not to lose control of incoming traffic.

Setup through the standard phone menu

The most convenient way to control voice parameters on Xiaomi Redmi 9

In the list of options that opens, you need to find a item that can be called “Call Settings”, “Additional Settings” or simply “Settings”, depending on the shell version. MIUI And you can also use your device's regional firmware, and inside this menu, you'll have a Call Forwarding section, and if you click on it, you can request permission confirmation or you can show you a short boot, because the smartphone accesses the network settings. SIM-If you have two cards installed on your device SIM-maps, the system will prompt you to choose which card you want to change the settings for, which is an important detail, since the settings for each SIM are stored independently.

Once you select a SIM card, you will see a list of the four types of forwarding we talked about earlier, with the current status of each option. Clicking on any of the items, such as "Redirect during employment", you will see a pop-up box with fields for entering the phone number to which the calls will be received. In the input field, you can specify any mobile or landline number, including the numbers of other operators, but it is worth remembering that the tariffing of such calls depends on the conditions of your carrier and may be paid.

It is important to note that the menu interface may vary slightly depending on whether you are using a global firmware version or a Chinese build with Russian installed. In some cases, especially on older versions of Android or custom firmware, the menu may not open or give an error of connection to the network, which requires switching to an alter, such as: USSD-However, for most Redmi 9 users with up-to-date security updates, this method is preferred because of its visibility and lack of need to remember complex digital combinations.

Use of the USSD-code-driven

For those who prefer speed and reliability, or in situations where the graphic menu of the phone for any reason does not respond, there are special options for the user. USSD-These codes are sequences of numbers and symbols that are sent directly to the operator's network, bypassing complex operating system interfaces. MIUI. Using codes is especially relevant if you need to quickly check the redirect status on another phone or if you encounter a software glitch in your smartphone settings menu.

The universal GSM standard has the following codes that work on most operators around the world, including Russia, Ukraine, Kazakhstan and the CIS. To activate unconditional forwarding, just enter the combination **21* number phone# and press the call button, after which you will receive a confirmation message from the network. To disable this function, the code ##21# is used, and to check the current status - *#21#, which allows you to instantly know where your calls are going at the moment.

Activation during employment: **67*phone number #




Disconnection during employment: ##67#




Unanswered activation: **61*phone number #




Unanswered Disconnection: ##61#




Complete reset of all redirects: ##002#

When using forwarding codes, you can also specify the delay time, although the default is the standard 15-20 seconds. The syntax of such a request looks more complicated: **61* phone number*11*time#, where the time is specified in seconds (usually a multiple of 5, such as 05, 10, 15, 20, 25, 30). If you want to simply reset all forwarding settings to the operator's factory values and you are guaranteed to disable all redirects, use the universal code ##002#, which is the "nuclear button" to reset these parameters.

⚠️ Attention: When entering USSD-A single-digit error can cause your calls to go to an outsider who may not tell you by simply ignoring other people's calls.

Features of working with two SIM-cards

Xiaomi Redmi 9 is equipped with a hybrid slot that allows you to use two SIM-maps simultaneously, which creates additional logic in setting up the redirect.Android operating system and shell MIUI They treat each SIM card as an independent communication device, with their own forwarding settings, voice mail, and identifiers. This means that by activating the transfer of calls on the first SIM card, you absolutely do not affect the settings of the second, and vice versa – they work in isolated profiles.

When you enter the call settings menu, the system always requires you to select your card first. If you accidentally choose the wrong SIM card, you will have to go back and start the process again, because there is no universal switch for all SIMs at once in the standard interface, this is designed specifically for flexibility, so that the user can, for example, redirect calls from the work SIM to the secretary, and calls from the personal one to the home phone, setting up two different behavior scenarios for the same device.

There is also a nuance to defining the primary number for outgoing calls, which does not directly affect incoming redirects, but is important for the overall logic of the phone. → SIM-You can assign cards and mobile networks which cards will be used by default for calls, but this does not change the rules of incoming filtering. If you plan to use Redmi 9 in “one phone for two numbers” mode, it is recommended to thoroughly test both directions of redirection by calling each number from the other phone.

Solving Connection Problems and Errors

Despite the debugging of the technology, Xiaomi users often face a situation when when trying to turn on the redirect appears pop-up with an error or message “failed to connect to the network”. Most often, this is not due to a smartphone breakdown, but to temporary problems on the operator's side or incorrect settings of voice services. SIM-Cards have funds, as many operators block the installation of new forwarding services with negative or zero balances.

Another common cause of failure is a conflict with Voice Mail. Often, voicemail operators default to a destination number for forwarding when busy or unanswered. If you try to manually set your number to these fields, the network may reject the request, believing that the standard service is already active, in which case pre-disabling voicemail via the operator's app or a call to support helps, after which manual setting on Redmi 9 starts working correctly.

If the call settings menu on your Redmi 9 consistently gives out a connection error even when the signal is good, try following these steps:

• 🔄 Reboot your smartphone: this will update your registration in the network and reset temporary network settings.
• 📶 Switch Network Mode: Temporarily Select 2G/3G customized SIM-Maps, try setting up a redirect, then return 4G/LTE.
• 📱 Check it out. SIM in another phone: this will help to eliminate the physical malfunction of the SIM card itself or its contacts.

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If Xiaomi’s standard menu gives you an error, try installing the Google Phone app from the Play Market. In its settings (three dots → Settings → Accounts and Imports → Redirect), the interface often works more stable and does not conflict with MIUI system errors.

Tariffing and Impact on Balance

The most important aspect that users often forget is the financial side of the issue: Call forwarding is not a free feature of the smartphone itself, but a network service of the operator, which is charged as an outgoing call from your number to the forwarding number, which means that if you get a call and the call is redirected to another number, your account will be charged according to the rate for the outgoing minute, even if you haven’t talked for a second.

If you are abroad and enable a number redirect in your home country, you will pay for international roaming of an outbound call from your host country to your home country, which can be very expensive. Some tariff plans have minute packages that cover such costs, but in most cases it is a separate item of expenditure that requires balance control.

There is also the concept of "intranet forwarding," which some operators offer free or at a reduced rate if both numbers (your and the target) belong to the same network. However, you should not rely on this without first checking the terms of the tariff. It is always better to assume that every minute of a call that has passed through a redirect will cost you money, and plan to use this feature accordingly.

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Call forwarding is always charged as an outgoing call from your number to the forwarding number.Make sure you have a margin of minutes or funds on your balance before using this feature for long periods.