How to disable Telbek on Xiaomi: the complete guide

Many Xiaomi smartphone owners encounter an obscure icon or setting called “Telbeck” in the call menu, a feature also known as VoLTE or enhanced voice communication, designed to transmit high-quality audio over a 4G network. However, depending on the carrier or network coverage in your area, using this technology can cause crashes, call interruptions or increased battery consumption.

If you notice that your phone loses network or the sound becomes intermittent during a conversation, it may be time to turn off this option. Disabling Telbeck often returns stability to mobile communication by switching the device to standard 2G or 3G protocols for voice calls. In this article, we will discuss in detail what this feature is, why it can interfere with and how to properly deactivate it on different versions of the MIUI shell.

It is worth noting that the setup process can vary slightly depending on the model of your gadget, whether it is a budget Redmi Note or flagship Xiaomi Mi. We will consider universal methods that work in most cases, and also touch on hidden engineering menus for advanced users.

What is the Telbek function and why turn it off

The term “Telbeck” (or Telback) in the context of Xiaomi smartphones is often confused with conventional suppression, but in this case it is a specific implementation of voice transmission. In fact, it is synonymous with or part of the VoLTE settings (Voice over LTE), which allows you to talk simultaneously using high-speed Internet, the technology is designed to improve speech intelligibility and reduce connection time.

However, not all carriers support this function stably, and the infrastructure of cell towers is not everywhere ready to ensure the smooth operation of voice over 4G. In such situations, the phone tries to hold the LTE signal for a call, but due to weak coverage, it constantly switches between modes, which leads to network loss or complete connection breakdown. The user sees the icon “HD” or “VoLTE”, but can not call.

Disabling this feature forces the smartphone to use classic communication channels (2G/3G), which, despite the lower data transfer speed, are characterized by high penetration and stability. Xiaomi engineers implement various software crutches to work with different operators, and sometimes manual (interference) of the user becomes the only solution to the problem.

⚠️ Note: Before making changes to your network settings, make sure your plan supports voice calls on networks. 2G/3G, In some rare cases, operators can only transfer subscribers to VoLTE.

The main reason to consider shutting down is because your phone is not working properly in the areas of insecure reception, and if your phone is constantly “jumping” between 4G and 3G during a conversation, deactivating the telbek is a logical step to stabilize the connection.

Preparing the smartphone to change the network settings

Before you go deep into the settings, you need to do minimal preparation of the device, which will help avoid accidental errors and allow you to quickly return everything as it was if the result does not suit you, and first of all, you should back up important contacts, although changing network parameters rarely affects the safety of data in memory.

Also worth checking is the current firmware version. In new MIUI or HyperOS updates, menu items may change. Go to the settings and see if there is a pending system update that could automatically fix the software bug with the connection.

  • 📱 Make sure the battery is at least 30% so that the phone doesn’t turn off during the setup process.
  • 📡 Pull out and wipe the SIM card, then insert it back in to rule out bad contact as the cause of the problems.
  • 🔄 Restart the device before you start manipulating to reset temporary network errors.

It's important to understand that disabling the Telbeck can affect the simultaneous operation of the Internet and voice. If you talk often while someone sends you heavy files in the messenger, after turning off the VoLTE, the Internet can temporarily switch to EDGE (E) or disappear.

⚠️ Warning: Do not try to change the settings in the engineering menu if you are not sure of your actions. Errors in system parameters can lead to complete loss of signal.

After these simple steps are done, we can go directly to the disabling methods, and we'll look at both the standard ways through the interface and the deeper ways of setting up.

Disconnection through the standard settings menu

The easiest and safest way to do this is to use Xiaomi’s standard interface, which is that in the latest versions of the shell, manufacturers often hide the VoLTE switch, but it’s still available in most regions. To start, open the Settings app and find the SIM and mobile section.

Depending on the version MIUI The path may look different. You usually have to go to Settings. → SIM-Select the SIM card that has problems and find "Use VoLTE" or "Improving Call Quality." The switch should be activated if the function is working.

☑️ Verification of VoLTE settings

Done: 0 / 1

If you don't see that, it's probably hidden by the operator, so try entering a special code in the call: ##86583##. This command forcibly hides or shows the VoLTE switch in the menu, and then you type in the message "VoLTE carrier check was DISABLED" (or ENABLED), which means activating the hidden menu.

Once the switch is turned off, you can turn it off, and the phone can lose the network for a few seconds, and then log in again without the support of high-speed voice. Check the quality of the connection by making a test call.

Action.Expected outputPossible challenges
Enter code #86583##The appearance of the VoLTE switchThe code doesn't work on some firmware
Turning off the VoLTE tumblerDisappearance of HD/VoLTE badgeTemporary loss of network
Phone rebootSecuring settingsSettings can reset

In some cases, especially on global firmware versions, this is the only method needed, but if the switch is missing even after you have entered the code, more sophisticated methods will have to be used.

Using the Engineering Menu to Disable

If standard methods fail, the Android Engineering Menu is a powerful tool for diagnosing and adjusting hardware available on most Xiaomi smartphones. Be careful: changing unfamiliar settings here can lead to unstable device operation.

To enter the menu, dialer the combination ##4636##. The Testing menu will open, where you can select Phone Information. If you have two SIM cards, select the appropriate one.

What if the code doesn't work?
If the code ##4636## Does not open the menu, perhaps your firmware blocks access to engineering settings. In this case, you can try installing the application “Mtk Engineering Mode” or similar to Qualcomm processors, but this requires installing third-party software. By default, there may be a value containing IMS or VoLTE (for example, LTE/TD-SCDMA/GSM IMS). You need to choose a choice without a prefix. IMS, for example, just «LTE/TD-SCDMA/GSM» or «WCDMA/GSM», if you want to exclude completely 4G. When you select the right mode, the phone immediately re-registers on the network. 4G It might disappear or stay, but the voice will be transmitted through the old protocols, which is the analog of shutting down the deep-level Telbek. 🔍 Find the "Set Preferred Network Type" line in the list. 📉 Choose a non-word option IMS VoLTE. ✅ Wait for the network icon to be in the bar status. After you change the settings, be sure to check incoming and outgoing calls. If the connection is more stable, then the problem was the conflict of equipment with networks. LTE Alternative methods and network resets Sometimes the problem is not a specific setup, but a accumulated software failure, in which case a complete reset of network settings helps. This action won’t delete your contacts, photos or apps, but will clear all stored Wi-Fi passwords, Bluetooth settings and mobile network settings. To perform a reset, go to Settings. → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth. Click Reset and confirm action. Once rebooted, the phone will behave like a new connection, and you’ll have to re-enter Wi-Fi passwords. Another method is using third-party apps to manage telecom settings, such as Force. LTE Only (4G/5G). They allow more flexibility in managing the type of network than the standard engineering menu, but they require caution and rights. ADB If none of these methods worked, it's possible that the problem is hardware-based or modem-level locking. In rare cases, changing the region in phone settings (for example, India or Singapore) helps, where VoLTE requirements differ and additional switches appear. ⚠️ Attention: A change in region can lead to ads in system applications and a change in the list of preinstalled software. In extreme cases, if the phone is warranty-free and the problem with the "telbeck" (cliffs, inability to call) is massive for your model, it is worth contacting the service center. You may need to flash the modem or replace the antenna module. The effect of the disconnect on the quality of communication and battery After you managed to turn off the Telbeck, you may notice changes in the behavior of the smartphone. First of all, this concerns the battery life. Constant search for a 4G signal in the area of poor coverage is one of the main energy eaters. Switching to 3G/2G often saves charge, as the module can even change the sound in the poorer mode. If you are in a confident zone, 4G, The sound may become a little more “telephone”, devoid of HD-quality. 📊 Yes, the connection has become more stable No, nothing has changed It got worse, lost the Internet Not noticed a difference It is important to note that disabling this feature can affect the speed of switching between the call and the Internet. Without VoLTE, the Internet may be briefly interrupted or switched to mode when an incoming call is made. EDGE. This is almost invisible to modern applications, but it can be critical for online games or video calls, and in the long run, using a stable, albeit older, communication standard extends the life of a smartphone’s radio module. Less heat, less power surges, less wear and tear on components. 3-4 This is an important factor of the year. 💡Disabling VoLTE is a trade-off between maximum sound quality in ideal conditions and the stability of real-world communications with its interference and coverage holes. Frequently asked questions (FAQ) Is it safe to turn off VoLTE on Xiaomi? Yes, it's absolutely safe. You won't damage the device or the SIM card. At worst, the phone will just run on the networks. 2G/3G, This is the standard operating mode for most mobile devices of the last 15 Will the Internet disappear after the Telbek shutdown? The Internet itself will not disappear, but its speed may slow down to the next level. 3G (H+/3G), If there is no coverage in your area 4G Or if the phone can't switch between modes quickly when you call, if you're in standby mode, the Internet will be running at the highest speed available, why don't I have a VoLTE switch on the menu? Operators often hide this switch because they control the connection of the service. USSD-If you use codes (e.g. #86583##) or an engineering menu. Does the shutdown affect WhatsApp and Viber? No, messengers use a data channel (the Internet) rather than a voice channel. They will work correctly as long as you have access to the network, regardless of the voice call settings. Do you need to reflash your phone to turn it off? 95 percent of the time, you don't need to flash it back, just change the settings in the menu or in the engineering mode, and only need to flash it in case of deep software failures that you can't fix by resetting your settings.