Modern mobile standards require high quality voice, and Voice over technology LTE (VoLTE has become the absolute standard for the Big Four operators: smartphone owners Xiaomi, Redmi and others. POCO Often, they face a situation where after a change SIM-map or move to another region function HD-Calls are no longer displayed on the menu or are not working properly, because smartphone firmware may not have relevant operator profiles for a particular region.
For MegaFon subscribers, the inclusion of this option is critical, since it allows you to simultaneously talk and use high-speed Internet without switching the network to 3G or 2G. In this article, we will analyze in detail the algorithms of actions for activating the service, using both standard system settings and specialized engineering menus.
The setup process can vary depending on the version of the MIUI shell or HyperOS, as well as the model of your device.We will look at universal methods that will suit most of the current gadgets released in recent years and help eliminate typical connection errors.
What is VoLTE and the benefits of technology for subscribers
Voice over LTE is a fourth-generation packet network, and unlike traditional calls that use circuit switching (CSFB), VoLTE transmits voice as a data stream, providing instant connectivity and crystal clear sound. For the user, this means no delays in starting a conversation and the ability to use a navigator or messengers during the time without falling to EDGE.
Use of the HD-voice allows you to save battery power, since the smartphone does not need to constantly switch between modes 4G and 3G In addition, the sound quality in Wideband Audio mode is much higher, which is especially important for business negotiations or conversations in noisy places.
- 📶 Instant connection to the subscriber without a long horn.
- 🗣️ High quality sound (HD Voice) free of distortion and noise.
- 🌐 Simultaneous work 4G-Internet and voice call.
- 🔋 Reduced power consumption due to the absence of constant network switching.
⚠️ Note: For the correct operation of the technology, it is necessary to SIM-The card and phone must support the standard 4G, a) there should be a stable coverage in your area of stay LTE.
MegaFon is actively implementing this technology, and in many regions it turns on automatically when compatible equipment is available, but Xiaomi smartphones, especially global firmware versions, sometimes require manual activation through an engineering menu or change of region.
Fare check and support for SIM-card
Before you go into deep system settings, you need to make sure that your SIM-The card and the tariff plan are technically ready to work with VoLTE. MegaFon provides this service for free, but it must be activated on the network side. SIM-Cards issued many years ago may not support modern voice encryption protocols.
The easiest way to check the status of the service is to send USSD-If the service is not active, you can connect it instantly, and you should also make sure that the smartphone settings have the right type of network.
Go to the phone's settings menu along the Settings path → SIM-Select your MegaFon SIM card and make sure that the "Use VoLTE" switch is in the active position. If this option is not available, go to the following sections of the instructions.
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If you're holding an old one. SIM-Large format card (cut-SIM), replace it in the salon with a new nano-SIM - this often solves problems with registration in networks 4G+.
Basic activation through smartphone settings
In most cases, it is enough to adjust the network profile correctly to enable the feature. The algorithm of actions may vary slightly depending on the version of Android, but the logic remains the same. First check whether the mobile Internet is turned on, since VoLTE works exclusively through it.
Open the settings, select the section «SIM-Click on the MegaFon SIM card, find "Network Type" and select Preferably LTE or 5G/LTE/3G/2G (The VoLTE switch shall be located below.
If, after switching on the toggler, the badge HD Or VoLTE didn't show up in the status bar, try restarting the device. IMS-operator.
Use of the Engineering Menu to Activate
If the standard switch is hidden or not working, you can use the Xiaomi engineering menu, which is a powerful tool for diagnosing and hidden settings of the radio module. Be careful when changing parameters, you should not touch unfamiliar settings.
Open the Phone app and dial ##4636##. If the code is entered correctly, the Test menu will open. Select Phone Information. In this menu, find the VoLTE Provisioned or Turn on VoLTE switch and activate it.
Once you turn on the option, the icon should appear in the status bar. If the code menu does not open, your firmware version may block this access, and you will need to use third-party applications or change the region.
What if the code doesn't work?
Changing the region and using activator applications
One of the common reasons for the lack of VoLTE on Xiaomi is the discrepancy between the firmware region and the region. SIM-For example, if you have a Chinese version of your phone or a global firmware with a Russia region, but the operator profile does not fit, changing the region can help.
Go to Settings → Additional Settings → Region and select a country other than the current one (like India or Indonesia – all features are often unlocked there). After changing region, restart your phone and check for the option.
There are also specialized applications, such as 4G Switch or VoLTE Switcher: These require root or use rights. ADB-For the average user, use a region change or engineering menu.
| Activation method | Difficulty | Need a Root. | Efficiency |
|---|---|---|---|
| Settings SIM-map | Low. | No. | High (officially) |
| Engineering menu (code) | Medium | No. | Tall. |
| Change of region | Low. | No. | Medium |
| Activator applications | Tall. | Often required | Depends on the model. |
| Standard path | 1/5 | No. | 90% |
| Code ##4636## | 3/5 | No. | 85% |
| Change of country | 2/5 | No. | 60% |
| Root rights | 5/5 | Yes. | 99% |
⚠️ Note: Using third-party applications to activate VoLTE on unofficial firmware may cause the communication module to work unstable.
Solving the problem: why VoLTE does not work on MegaFon
Even after you've done all the work, the icon may not appear, and a common reason is that you don't have IMS coverage in a particular location, you try moving to the city center or opening a window, and you can also have a problem with the settings of the APN hotspot.
Check the access point settings. They should be automatic. If you've used manual settings, reset them to the factory. → SIM-maps and mobile networks → SIM-map → Access points (APN) → Drop it.
Sometimes, a complete reset of network settings helps. This will remove stored Wi-Fi passwords and Bluetooth devices, but return network settings to factory status. Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.
☑️ Diagnostics of problems with VoLTE
Frequently Asked Questions (FAQ)
Does VoLTE affect traffic consumption?
Can I use VoLTE if I am abroad?
Why does the VoLTE icon appear and disappear?
Do I have to pay separately for a VoLTE connection?
Does VoLTE work on two SIM cards at the same time?
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If standard settings don’t help, the safest and most effective method is to use the engineering menu using the ##4636## code, which does not require root rights.
Setting up Voice over LTE on Xiaomi devices with MegaFon is straightforward, but requires attention to detail. By following the sequence of actions from tariff checks to engineering settings, you are guaranteed to have access to quality communication. Remember that firmware updates can change the location of menu items, so always update your smartphone software.