VoLTE in Xiaomi Redmi 9C: why you need, how to enable and solve connection problems

Xiaomi Redmi 9C is a budget smartphone that is still popular due to its price-performance balance, but many owners do not fully understand what VoLTE is in the phone settings and why operators are actively promoting this technology. If you notice that during a conversation, the quality of the Internet deteriorates or calls suddenly stop when you switch between networks, the problem may be in the VoLTE turned off.

In this article, we'll look at what VoLTE (Voice over LTE) is like with the Redmi 9C, how to set it up properly, what the technology is doing, and why you can't do without it in 2026, and how to test your carrier's support for VoLTE, and what to do if the feature doesn't work despite the phone's support for it, and we'll also touch on common myths like that VoLTE eats a battery or requires a separate fee from the operator.

What is VoLTE and why is it important for Redmi 9C?

VoLTE (Voice over LTE) is a 4G (LTE) voice technology, unlike traditional 2G/3G calls. In Xiaomi Redmi 9C, this feature is built into the iron level, but can be disabled by default. The main advantage of VoLTE is that calls do not interrupt the Internet connection: you can talk and use mobile traffic at the same time (for example, Google information or watch maps).

Without VoLTE, the phone switches to old networks (2G/3G) when calling, which leads to:

• 📉 The Internet speed drop to the level EDGE (up to 0.3 Mbps).
• 🔄 Delays in switching between networks (sometimes up to 5-10 seconds).
• 📞 Call breaks in areas with unstable coverage 3G.
• 🔋 Increased battery consumption due to constant switching between networks.

In 2026, most Russian operators (MTS, Beeline, Tele2, MegaFon) actively transfer subscribers to VoLTE, as this allows you to unload outdated 2G/3G networks. For example, MegaFon has already announced a gradual shutdown of 3G in some regions - without VoLTE, your Redmi 9C will simply stop calling in these areas.

Does the Xiaomi Redmi 9C support VoLTE technology?

Xiaomi Redmi 9C (model M2006C3LG for the global market and M2006C3MI for India) officially supports VoLTE at the hardware level.

• 📄 Manufacturer specifications: specifications indicate "VoLTE enabled».
• 🔧 Settings MIUI: menu SIM-The card has a separate switch for VoLTE.
• 📡 User Tests: on forums (e.g, 4PDA) There are confirmations of successful work with Russian operators.

However, there is a caveat: support for VoLTE depends not only on the phone, but also on:

1. Telecom operator – not all tariffs support VoLTE (for example, some “old” Beeline rates).
2. Firmware versions – early MIUI builds for Redmi 9C could have bugs with VoLTE.
3. Regional settings – in some countries, VoLTE is disabled at the operator level.

How to enable VoLTE on Xiaomi Redmi 9C: step-by-step instructions

You can activate VoLTE on Redmi 9C in 2 minutes.

1. Open the settings (cog icon).
2. Go to section. SIM-maps and mobile networks.
3. Choose. SIM-The card you want to include VoLTE for (if there are two of them).
4. Slip on the item VoLTE calls (or VoLTE calls in English firmware).
5. Activate the switch. If the option is not available (grey), see the section "Why VoLTE does not work".

When you turn on the network indicator, you'll see an HD or VoLTE sign in the status bar, which means that the function is active.

• 📞 Call another phone.
• 🌐 Without stopping the call, try opening a website or launching YouTube.
• ⚡ If the Internet is working, VoLTE is set up correctly.

If after activating VoLTE calls stopped or there was interference, try:

⚠️ Turn off VoLTE, restart your phone, and turn on again. Sometimes the failure is due to a conflict with the operator's settings. Also check if the mode is activated. 2G network-setting.

Table: comparison of calls with VoLTE and without Redmi 9C

As you can see from the table, VoLTE wins in most respects, except roaming, but even here there is a plus: some operators (for example, MTS) provide VoLTE roaming at special rates.

Why VoLTE doesn’t work on Xiaomi Redmi 9C: 7 reasons and solutions

If you have enabled VoLTE in the settings but the feature is not activated, check the following points:

1. Older firmware. Early MIUI versions for Redmi 9C (below MIUI 12.0.3) had bugs with VoLTE. Update through Settings → About Phone → System Update.
2. Unsupported SIM-Old map. SIM (released before 2018) may not support VoLTE. Contact the operator's cabin for a replacement.
3. Operator lock: Some rates (e.g. Super Beeline or Tele2's All for 300) do not include VoLTE by default. Check the operator's website or call support (*111# for MTS, *105# for Beeline).
4. Conflict with Dual SIM. If you have two. SIM-cards, try to disable the second or change the slots. 9C VoLTE can only work on one SIM once.
5. Regional restrictions: In some regions (e.g. Crimea, DPR/LPR), VoLTE may be disabled due to coverage.
6. Hardware failure. If VoLTE never worked after resetting, it might have damaged the modem, and only the service center will help.
7. Rooting or custom firmware. Unofficial MIUI builds (like Xiaomi.eu) can break VoLTE. Go back to stock firmware.

💡

If VoLTE is not enabled, try manually selecting the network. 4G: Go to Settings. → SIM-map → Type of network → Only 4G (LTE). Sometimes it is forced to activate the function.

Attention! If the Internet is lost after VoLTE is turned on or calls start to stop, there may be a problem with the APN settings.

⚠️ Go to Settings. → SIM-map → Access points (APN) and make sure that the parameters of your operator are selected. For MTS: Internet.mts.ru, for Beeline: Internet.beeline.ru. APN missing, add it manually.

VoLTE and battery: Is technology really draining the phone?

One of the common myths is that VoLTE is eating the battery.

• 🔋 Without VoLTE, the phone is constantly switching between 4G (for the Internet) and 3G/2G (for calls), which consumes additional energy.
• 🔋 With VoLTE, the smartphone remains on the same network (4G), modemize.

Tests show that when used actively (calls + internet), the Redmi 9C with VoLTE lasts 10-15% longer than without it.

• 📶 In low signal areas 4G Your phone may spend more energy maintaining a connection.
• 🔄 If VoLTE is unstable (permanent cliffs), it really drains the battery.

To minimize battery consumption:

1. Turn on the adaptive battery in the settings → Battery.
2. Turn off Network Search in roaming if you are not traveling.
3. Use the Traffic Saving Mode in the Settings SIM-map.

💡

VoLTE does not drain the battery by itself – the problem arises only when the signal is unstable 4G. In urban environments, the technology, on the contrary, prolongs the life.

VoLTE vs ViLTE vs VoWiFi: What’s the difference and what’s best for the Redmi 9C

In addition to VoLTE, other voice communication technologies can be found in Xiaomi Redmi 9C:

For the Redmi 9C, VoLTE + VoWiFi is the best choice.

• 🏙️ Stable communication in the city (VoLTE).
• 🏡 Quality calls at home or office (VoWiFi).

To turn on VoWiFi:

1. Go to Settings. → SIM-map → VoWiFi challenges.
2. Activate the switch.
3. Connect to Wi-Fi.

VoWiFi may not work with corporate networks (such as hotels or airports) where they are blocked. UDP-In this case, use VoLTE.

FAQ: answers to frequent questions about VoLTE in Xiaomi Redmi 9C