How to connect VoLTE to Xiaomi: step-by-step instructions with pictures and codes

Did you buy a new Xiaomi smartphone and find that while talking on the phone, the Internet disappears? or the operator requires you to activate VoLTE for proper operation. 4G? This problem is familiar to many Redmi owners, POCO And the Mi series. The thing is, Voice over technology. LTE (voice 4G) Often disabled by default - either because of the features of the firmware MIUI/HyperOS, or because of the SIM card settings.

In this article, we will discuss all the working ways to enable VoLTE on Xiaomi, from standard settings to hidden engineering menus. You will learn why VoLTE may not work even after activation, how to check the support of the technology by your operator, and what to do if the menu does not include the item "VoLTE".

What is VoLTE and why should it be included?

VoLTE (Voice over LTE) is a 4G voice technology that replaces the outdated 2G/3G standard for calling. Without VoLTE, your smartphone automatically switches to a slow 3G or 2G network when you call, which is why:

• 📉 Internet speed drops during a conversation (websites do not load, messengers slow down).
• 🔋 Battery discharges faster due to constant switching between networks.
• 📞 Deteriorating communication quality (noise, cliffs, voice delays).
• ⏱️ Longer joins the challenge (before) 5-7 second-on 1-2 VoLTE).

Since 2023, most Russian operators (MTS, Beeline, MegaFon, Tele2) actively transfer subscribers to VoLTE, disabling support for 2G/3G in some regions.

⚠️ Attention: Xiaomi with firmware MIUI 12 VoLTE can be hidden in settings if the SIM card does not support the technology. Before setting up, check whether your carrier’s VoLTE is active – call support or send it to the operator. USSD-request *111*55# (for MTS).

How to check if your Xiaomi VoLTE supports

Not all Xiaomi models support VoLTE, especially older or budget models. Here's how to find out if your smartphone is compatible:

1. Check the official list of supported devices on the operator's website, for example, MTS publishes it here.
2. Make sure your firmware is no older than MIUI 11 – earlier versions of VoLTE are unstable.
3. Check your model's LTE support, for example, the Redmi 9A does not support the Band 20 (800 MHz), which uses Tele2 for VoLTE.

If your model is marked in the table as "❌ No, but you see VoLTE in the settings -- it doesn't guarantee performance. It's likely that the smartphone just displays the option, but the operator doesn't support it.

Method 1: Enabling VoLTE through standard settings

The easiest method is to activate VoLTE in the smartphone menu, which is suitable for MIUI 12-14 and HyperOS:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose your SIM card (if there are several).
3. Tap on the network type or preferred network type.
4. Choose 4G (preferably)/LTE or 4G/3G/2G (auto).
5. Go back and find the VoLTE switch (can be called Voice over LTE or Enhanced Calls). Activate it.

If there is no VoLTE item:

• 🔍 Check if the SIM card is inserted into slot 1 (on some models, VoLTE only works with the first slot).
• 📱 Update the firmware to the latest version (see section below).
• 🔄 Reboot your smartphone.

⚠️ Note: On some models (Redmi Note 11, POCO M4 Pro) the icon disappears after VoLTE is turned on 4G+ It's normal -- the technology works, but the indicator doesn't show up.

Method 2: Activate VoLTE through the Engineering Menu (for the experienced)

If the standard method didn’t work, try turning on VoLTE through the hidden engineering menu. Be careful – wrong actions can disrupt the network!

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. Select Phone Information (or Phone Information).
3. Scroll down to the Set preferred network type block.
4. Select LTE only or LTE/WCDMA/GSM auto.
5. Go back and find the VoLTE provisioned. If it's Disabled, tap it to activate.

For models on Qualcomm Snapdragon (most Xiaomi) also runs the code:

##86583##

After entering, the VoLTE Test menu will open, where you need to select Enable VoLTE.

Method 3: Update firmware to support VoLTE

If VoLTE doesn't turn on, the problem could be with outdated firmware. Xiaomi regularly adds support for new carriers in MIUI/HyperOS updates.

How to update:

1. Go to Settings → About the phone → System update.
2. Click Check for updates.
3. If a new version is available, download it and install it.

If the update doesn't come in:

• 🌍 Check the firmware region. VoLTE may not work on the Global version if you use a Russian carrier's SIM card. EEA or Russia-version.
• 🔧 Install the update manually. Download the latest firmware for your model from en.miui.com and run through Settings. → The phone. → Updating the system → Three points. → Select a firmware file.

💡

If after the update, VoLTE stopped working, reset the network settings: Settings → SIM-maps and mobile networks → Reset mobile network settings. This will delete the stored access points. APN, but often solves the problem.

Method 4: Set up APN for VoLTE

Sometimes VoLTE doesn’t work because of the wrong APN settings, which operators often update, but the smartphone doesn’t automatically pull them up.

How to set up your APN manually:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click on the current APN profile (e.g. internet.mts.com).
3. Check the following parameters (for MTS): Name: MTS VoLTE APN: internet.mts.ru Type APN: default,supl,ia Protocol: IPv4/IPv6 Port: 8080 MCC: 250 MNC: 01
4. Save the changes and restart the smartphone.

APN settings for other operators:

• 📡 Beeline: APN — internet.beeline.ru, MNC — 99.
• 📡 MegaFon: APN — internet, MNC — 02.
• 📡 Tele2: APN — internet.tele2.ru, MNC — 20.

⚠️ Note: On Xiaomi with two SIM cards, VoLTE can only work on one of them. SIM 1 but you want to use it on your own. SIM 2, you will have to change the SIM cards in places or turn off VoLTE on the first one.

What to do if VoLTE does not work after all settings

If you’ve tried all of these methods but VoLTE is still not activated, check out the following:

• 📵 Operator's problem, call support and check if the service is activated on your number. USSD-request (e.g. request, *111*55# for MTS).
• 🔄 Conflict with other settings. Turn off Wi-Fi Calling (if enabled) — these technologies can interfere with each other.
• 🛠️ If the smartphone fell or got wet, the modem could get damaged. → The phone. → Status. SIM-If status unknown or error, please bring it to the service.
• 📲 Incompatible SIM card. VoLTE requires USIM-map (not an outdated one) SIM). Check in the cabin operator, whether a replacement is necessary.

If nothing works, the last option is to reset to factory settings. Be sure to back up the data before you do that!

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VoLTE may not work due to software constraints, for example, on Xiaomi Mi A3 (Android One), VoLTE is locked at the core level and only activated after installing a custom Recovery.

FAQ: Frequent questions about VoLTE on Xiaomi