How to enable VoLTE on Xiaomi Redmi 5 Plus: a complete guide to compatibility check

VoLTE Technology (Voice over) LTE) allows you to call in format HD-voice 4G-network, not through outdated 2G/3G, how smartphones did it 10 years ago, on Xiaomi Redmi. 5 Plus (codename vince) VoLTE support is implemented at the hardware level, but is often disabled by default - due to operator settings, firmware or even regional restrictions. HD or VoLTE next to the network indicator, this does not mean that the function does not work: it must be activated correctly.

In this article, we’ll look at all the ways to enable VoLTE on the Redmi 5 Plus, from basic settings to manually editing configuration files, how to check for carrier compatibility, update firmware to support modern communication standards, and even manually add APN settings if the automatic settings don’t work, and what to do if VoLTE is turned on but calls are interrupted or the sound is jammed.

Why does VoLTE not work on Redmi 5 Plus out of the box?

The reasons for the lack of VoLTE on Xiaomi Redmi 5 Plus fall into three categories:

• 📱 Software limitations: Stock firmware MIUI For some regions (e.g. global version) it may not include VoLTE profiles for local operators.
• 📡 Operator's Problems: Not All SIM-The cards support VoLTE even if the smartphone is technically compatible, for example, Tele2 did not provide this service at subscription-free rates until 2021.
• 🔧 Wrong settings APN: If the access point parameters are in the network (APN) If the phone is out of date or out of date, it won’t be able to connect to VoLTE even if the feature is activated in the menu.

Interesting fact: Redmi 5 Plus supports VoLTE on Band 3 (1800 MHz) and Band 7 (2600 MHz) frequencies - these are the ones used by most Russian operators. SIM-The card is tied to outdated infrastructure (for example, only works in the 2G), VoLTE will not work until you update the tariff or change the card to a new one. USIM (universal SIM supportive 4G).

Step 1: Checking Compatibility SIM-card-and-operator

Before digging into your phone settings, make sure your carrier and SIM-The card is generally VoLTE-enabled. Here's how to check:

1. Clarify the model SIM-Cards: VoLTE only works with USIM (or 4G SIM). If you have an old card (for example, issued before 2015), it must be replaced in the operator’s cabin, you can check the type in your personal account or by number: map format. 89xxxx rustic.
2. Check VoLTE coverage: Go to the operator’s website and find a coverage map. For example, MTS VoLTE is available in all regions of Russia, and Tele2 only in major cities.
3. Activate the service: Some operators have VoLTE connected automatically, but sometimes you need to send it. USSD-team: 📶 MTS: *111*54# → challenge 📶 Beeline: *110*180# → challenge 📶 MegaFon: *105*500# → challenge

Important: If you use two SIM-VoLTE will only work on the card that is installed in the slot. 1 (Slot 1). Slot 2 on the Redmi 5 Plus only supports only one thing. 2G/3G.

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Before the replacement SIM-Save contacts to the cloud or computer when transferring to a new one USIM They are not automatically copied.

Step 2: Enable VoLTE through MIUI settings

If SIM-Card and operator support VoLTE, try to enable the function in the standard way:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if two of them).
3. Slip on 4G Call (VoLTE) item.
4. Switch the slider to the position on.

If the 4G call (VoLTE) item is not on the menu, it means:

• 🔄 Your version. MIUI does not support VoLTE for your carrier (you need to update the firmware).
• 📵 SIM-The card is not recognized as compatible with 4G (Check the slot or replace the card).
• 🛠️ The function is hidden in the engineering menu (see Step 4).

Step 3: Update the firmware to support VoLTE

MIUI stock firmware for Redmi 5 Plus is often devoid of VoLTE profiles for Russian operators. The solution is to install custom firmware (for example, xiaomi.eu) or upgrade to the latest official version through Settings → About Phone → System Update.

If the update “over the air” does not help, download the firmware manually:

Warning: Custom firmware installation resets the phone to factory settings. Pre-backup through Settings → Additional → Backup and Reset.

Step 4: Manually enable VoLTE through the Engineering Menu

If VoLTE is not displayed in the settings, it can be activated via the Engineering Mode, which works on most firmware, but requires caution - incorrect changes can disrupt the network.

Instructions:

1. Open the Phone app and enter the combination: ##4636## The Testing menu will appear on the screen.
2. Select Phone Information (or Phone Information).
3. Scroll down to Set preferred network type.
4. Select LTE only or LTE/UMTS auto.
5. Go back and find the VoLTE provisioned option – it should be enabled (if not, tap it).

If VoLTE has not worked after these actions, check:

• 🔌 Is it inserted correctly? SIM-card (slot 1).
• 📶 Is there a badge in the status bar? 4G (Without it, VoLTE doesn't work).
• 🔄 Restart your phone – sometimes changes only apply after a reboot.

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The engineering menu is a powerful tool, but changing unfamiliar settings can lead to network loss. If you're not sure, don't touch settings that aren't mentioned in the manual.

Step 5: Set up APN for VoLTE manually

The incorrect APN (Access Point Name) settings are one of the main reasons VoLTE doesn't turn on, and even if the carrier supports the technology, the phone won't be able to connect to it without the right settings. Here's how to add them:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click Add Access Point (or + in the upper right corner).
3. Fill in the fields according to your operator’s data (see the table below).
4. Save the settings and restart the phone.

Important: Once you add an APN, select it from the list and set it as active (check next to the name). If you already have an access point with that name on the list, delete it before creating a new one.

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If the Internet is gone after setting up the APN, check that the APN Type field indicates default,supl (without spaces).

Step 6: Resolve VoLTE problems (calls are cut off, no sound)

VoLTE is on, but not all functions are working? Here are the typical problems and solutions:

• 🔇 No sound when calling: Check if the mode is activated on the plane or Do not disturb. Also try to disable Voice Improvement in call settings.
• 📞 Calls are dropped through 10-20 Seconds: This is a sign of instability 4G-Try the engineering menu (##4636##) set up LTE only LTE/3G/2G auto.
• 🔄 VoLTE turns on, but after an hour it turns off: The culprit is energy saving. Turn off optimization for the Phone application in Settings → Battery → Optimizing the battery.

If problems persist, try resetting your network settings:

1. Go to Settings → System → Additional → Resetting settings.
2. Select Network Settings Reset (does not reset data, only network settings).
3. After the reboot, reset the APN and turn on VoLTE.

FAQ: Frequent questions about VoLTE on Redmi 5 Plus