Modern smartphones like Poco X3 Pro, have powerful capabilities for voice transmission through LTE-network, but often users are faced with the fact that the HD-Owners of Xiaomi devices and their sub-brands sometimes notice the absence of the cherished VoLTE icon in the status bar even with a connected tariff with support for technology. This may be due to both software limitations of the firmware and incorrect settings of the access point in the operator’s network.
Tele2 is actively developing its VoLTE infrastructure, but for stable operation on Xiaomi smartphones, manual intervention in system parameters is often required. Standard Android settings menus do not always provide access to hidden engineering switches that control voice call priority. In this article, we will discuss all ways of forcing the service to activate, from simple actions on the menu to the use of specialized utilities.
Verification of the compatibility of the tariff and network coverage
Before you delve into the phone’s complex settings, you need to make sure your data plan and current location support voice over technology. LTE. Operator. Tele2 service HD-calls by default for most modern tariffs, but in some rare cases it is required to activate through a personal account or USSD-Make sure there are funds on the balance sheet and the service is not blocked.
It's also critical to have a robust 4G signal in your area of stay. If the phone is constantly switching between 3G and 4G, VoLTE is not stable. Try moving to a better reception location or rebooting the device so that it registers again on the network.
- 📡 Check for a badge. 4G/LTE top-of-screen.
- 💳 Make sure your SIM card is no older than 5 years old (older cards may not support newer protocols).
- 📞 Call support. Tele2 to confirm the status of the service on the number.
Your Poco X3 Pro is technically capable of working with this technology, but the MIUI or HyperOS software shell may hide the option for regions where the operator has not yet been fully certified.
Basic network setting in the smartphone menu
The first step to solving this problem is through the standard Android settings menu. Often, it is enough to switch the network type to re-query the operator's profile. Open the settings and go to the section responsible for the management of the system. SIM-maps and mobile networks.
You need to find the option for the preferred network type. Select the mode that includes LTE. If you select 3G Only or 2G/3G, the call function will not work. Also check if the "Use VoLTE" switch is activated if it is available in your interface.
☑️ Basic settings check
In some versions of Xiaomi firmware, this switch may be hidden. If you don't see the power option, try retrieving the SIM card, restarting the phone, inserting the card back and checking the menu again. Sometimes the system only uses the operator configuration file when you first register. SIM-maps after resetting network settings.
⚠️ Warning: Do not turn on the "only" mode LTE" For persistent calls, if you're not sure of coverage, in this mode, incoming calls may not pass if the network is not sure. 4G It will suddenly disappear because the phone will not be able to switch to the phone. 3G voice-call.
Use of the Engineering Menu to Activate VoLTE
If standard methods didn't work, the most effective way is to access the engineering menu through system code. This is a hidden partition of Android that allows you to control the radio module directly. For Xiaomi Poco X3 Pro, this method is often the only working solution.
Open the Phone app and dial ##4636##. If the code is entered correctly, the Testing menu will open. Select Phone Information. You will find the Set Preferred Network Type section and select the option that contains IMS or VoLTE.
Recommended values for selection:
LTE Preferred
LTE/TD-SCDMA/UMTS (IMS)
NR/LTE/GSM (IMS) for 5G networksOnce you select the desired option, IMS support is immediately activated. You should see the HD or VoLTE icon in the status bar. There is also a separate "VoLTE provisioned" switch on this menu, which you must force to turn on (check).
What if the code doesn't work?
It's important to understand that when you reboot your device, you can reset your menu settings, and you have to do it again, and some users use third-party apps to fix those settings, but that requires root rights, which is not recommended for regular users for security reasons.
Setting up an APN access point for Tele2
The correct operation of multimedia services and voice calls over LTE depends on the correctness of the prescribed parameters of the access point (APN), errors in these settings often lead to the fact that the Internet works, and voice services do not.
Go to the settings. SIM-maps and select "Access Points (APN)". Press the menu button (three dots or "More") and select "Reset to Default." This action will return the factory settings that the phone will download from the SIM card. If that doesn't help, create a new access point manually.
| Parameter | Value for Tele2 | Note |
|---|---|---|
| Name. | Tele2 Internet | Any name |
| APN | internet.tele2.ru | Lowercase is a must. |
| Type APN | default,supl,ims | Important: Add ims |
| Protocol | IPv4/IPv6 | Recommended |
Pay special attention to the field "APN type." It is the ims parameter responsible for the multimedia services subsystem necessary for VoLTE to work. Without this value, the phone will use LTE only for data transfer, and calls will translate to 3G.
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Once you have created a new hotspot, be sure to restart your smartphone. Simply switching the radio module (air mode) may not be enough to apply changes at the core level of the system.
Problems with MIUI firmware and global versions
Owners of Poco X3 Pro often face a situation where the Chinese version of the firmware VoLTE works, but the global (Global) – not. This is due to the fact that global firmware Xiaomi have a separate list of operators for which the function is allowed by default. Russia and Tele2 operator may not be on this list for a particular version of the software.
The solution could be to change the region of the phone. Go to the settings -> Advanced Settings -> Region and select a country where Tele2's VoLTE works exactly or where the technology is more common, such as India or Indonesia. After changing region, restart the device and check for the icon.
Another option is to install a third-party application such as Xiaomi EU or use system file editing tools (requires an unlocked bootloader), however, for most users, changing the region is the safest and easiest way to get around software restrictions.
⚠️ Note: Install custom firmware or modified versions MIUI This can lead to loss of warranty and disruption of banking applications (Google) Pay/Mir Pay will stop working without additional manipulation of certificates).
Additional commands and reset settings
If none of the above works, you can try resetting your network settings, which will delete stored Wi-Fi passwords and associated Bluetooth devices, but return the network modules to their original state. → Connection and sharing → Reset Wi-Fi, mobile network and Bluetooth.
There is also a team to check the status. IMS. In the same engineering menu (#4636##) you can see the statistics. If the "VoLTE provisioned" column is false, then the network or the network is false. SIM-The card didn't pass the profile. SIM-card, insert into another phone, turn on VoLTE there, and then return to Poco X3 Pro.
In rare cases, manual network registration helps. In the network selection menu, turn off automatic selection and wait for the list of available carriers. Choose Tele2 manually. Sometimes this causes the network to repurpose the connection and offer a full package of services, including IMS.
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Integrated approach: most often the problem is solved by a combination of changing the region to India and manually editing the network type in the engineering menu to the option with IMS.