VoLTE in Xiaomi Redmi 9A: Complete guide to setting up and troubleshooting

Xiaomi Redmi 9A — It's one of the most popular budget smartphones, but many owners still don't use it to its full potential. LTE), network-based 4G, Not to switch to outdated 2G/3G. In this article, we will discuss what is VoLTE in Redmi. 9A, How to turn it on, why it may not work, and which operators support this function in the 2026 year.

If you notice that the Internet is lost during calls or the quality of communication is poor, the problem is probably the disabled VoLTE. Even in the budget segment, this technology has already become standard, but not all operators and firmware work with it correctly. 9A different SIM-maps and collected all the nuances in one guide.

What is VoLTE and why is it needed in Xiaomi Redmi? 9A

VoLTE (Voice over LTE) — It's a fourth-generation voice technology (4G). Unlike traditional calls that use networks. 2G or 3G, VoLTE allows you to:

• 📞 Call without losing the internet – while talking 4G remains active, you can simultaneously use messengers or a browser.
• 🎤 Improve the sound quality – codec is used HD Voice (AMR-WB), which transmits voice over a wider range of frequencies.
• ⚡ Reduce connection time – the call connects 2 times faster than with a conventional set.
• 📶 Save battery power – the smartphone does not need to constantly switch between networks.

At Xiaomi Redmi 9A VoLTE support implemented at the hardware level (MediaTek Helio chipset) G25), But it's a job that's required:

1. Compatible SIM-map (nano format supporting the 4G).
2. Activated VoLTE service from the operator.
3. The correct settings in the smartphone.

Without VoLTE, your Redmi is yours. 9A when you call, you'll fall off 4G on 3G/2G, resulting:

• 🚫 Interrupting downloads and streams.
• 📉 Deterioration of communication quality in places with weak 2G/3G-covering.
• ⏳ Delays in connection (up to) 5-7 seconds).

How to check if your Xiaomi Redmi supports 9A VoLTE

Not all versions of Redmi 9A They work equally well with VoLTE. Here's how to know if your smartphone supports this technology:

1. Checking the model and regional firmware

VoLTE depends on the firmware version and the regional code of the device.

1. Open the Settings. → The phone.
2. Find the lines of the model (should be) M2006C3LG or M2006C3LI) and the version MIUI.
3. Scroll down to All options and find the Region (should be Russia, Global or EEA).

If you have a Redmi. 9A firmware for India (IN) china (CN), VoLTE may not work properly or it may not work at all, and this will require a global update.

2. Verification of operator support

Even if your smartphone supports VoLTE, your carrier may not provide it.The current list of VoLTE-enabled carriers in 2026:

To make sure that yours is yours. SIM-The card supports VoLTE:

1. Call the operator’s short number (e.g. *111# for MTS).
2. If during the call in the status bar remains an icon 4G — VoLTE is already active.
3. If the network is switched to 3G or+ — no support.

💡

If you're old. SIM-Card (issued before 2018), replace it with USIM In the cabin of the operator - it is free and takes 5 minutes.

Step-by-step: how to turn on VoLTE on Xiaomi Redmi 9A

If your smartphone and carrier support VoLTE but the feature doesn’t work, follow this instruction:

Method 1: through the MIUI settings

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if two of them).
3. Tap by Network Type and select 4G (recommended).
4. Go back and find VoLTE (or Improved Calls)
5. Activate the switch.

If there is no VoLTE call point:

• 🔄 Reboot your smartphone.
• 📶 Manually select the operator network in Settings → Mobile network → Network operators.
• 🔧 Update. MIUI up to the latest version (see section below).

Method 2: through the engineering menu (if VoLTE is not displayed)

If there is no VoLTE option in the settings, it can be forced to activate via the engineering menu:

1. Open the Phone app and dial ##4636##.
2. Select Phone Information.
3. Scroll down to Network Type Installation.
4. Select LTE only or LTE/UMTS auto.
5. Go back and find the VoLTE provisioned option – if it is Enabled, the function is active.

Make sure that SIM-card 4G|Update. MIUI last-minute|Check the cover. 4G in your region|Activate the mode "4G (recommended)" in network settings-->

Once activated, make a test call. If the status bar remains 4G or a badge appears HD And next to the signal level, it's all working.

💡

If after turning on VoLTE calls do not pass or are reset, turn off the function and contact the operator - the problem may be on his side.

Why VoLTE doesn’t work for Xiaomi Redmi 9A: common problems and solutions

Even after you set it up properly, VoLTE may not work, and here are the most common reasons and ways to fix them:

1.Outdated version MIUI

Redmi 9A VoLTE only received support from versions MIUI 12.0.3 and higher, if you have an older firmware:

1. Go to Settings → About the phone → System update.
2. Download and install the latest version (current at 2026) MIUI 14).
3. After the update, restart the device and check the VoLTE settings.

If the update doesn't come in:

• 🔌 Connect to Wi-Fi.
• 🔄 Click on the three dots in the top right corner and select Update Package.
• 📥 Download the firmware manually from the official Xiaomi website (choose the version for Redmi). 9A with the mark Global or Russia).

2. Incompatible SIM-map

Old one. SIM-The card (issued before 2018) does not support VoLTE:

• By appearance: USIM has gold contacts with 6 contact points (old ones) SIM 8).
• Through settings: C Settings → SIM-The card should be marked 4G or USIM.

If SIM wrong:

⚠️ Note: Do not try to cut off the old SIM Nano-format won't make it compatible with VoLTE. Only official replacement in the cabin of the operator guarantees performance.

3. Problems with settings APN

Incorrect parameters of the access point (APN) They can block VoLTE. They can reset them:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click on the three dots in the top right corner and select Reset to default values.
3. Reboot your smartphone.

If the reset does not help, enter the parameters APN manually (examples for popular operators):

For MTS:


Name: MTS




APN: internet.mts.ru




Proxy: Not specified




Port: Not specified




User name: mts




Password: mts




Type of authentication: PAP or CHAP




Type APN: default,supl,mms

Hardware restrictions

In rare cases, VoLTE may not work because of:

• 📡 Poor coverage 4G — Check the signal level in the settings → SIM-map → Signal strength.
• 🔋 Savings of charge - disable the Battery mode → Energy conservation.
• 🛠️ Modem damage – if the smartphone fell or got wet, repairs may be required.

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

Besides VoLTE, at Redmi. 9A There may be other voice technologies, and let's see how they differ:

At Redmi. 9A Of these technologies, only VoLTE and VoWiFi are available, the latter being enabled in the same settings as VoLTE, but requiring the use of VoLTE:

• 📶 Wi-Fi connections.
• 🔄 Activation in Settings → SIM-map → Wi-Fi calls.
• 🏠 Support by the operator (check on your provider’s website).

VoWiFi is useful in places with poor mobile signal (for example, in basements or outside the city), but does not replace VoLTE completely - when leaving the Wi-Fi zone, the call can be interrupted.

How to turn off VoLTE on Xiaomi Redmi 9A (And why might it be necessary)

While VoLTE usually improves the quality of communication, it is worth turning it off in some cases:

• 📵 If calls are frequently interrupted or not connected.
• 🔋 If you notice an increased battery consumption (modem) 4G consume more energy).
• 🌐 If you are travelling abroad and your partner operator does not support VoLTE.

To deactivate VoLTE:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Turn off the VoLTE call switch.
4. Reboot your smartphone.

⚠️ Warning: After disabling VoLTE smartphone will switch to 3G/2G If you want to stay connected on instant messengers (such as WhatsApp or Telegram), use VoWiFi as an alternative.

FAQ: Answers to Frequent Questions about VoLTE in Xiaomi Redmi 9A