v0 LTE Xiaomi: what it is, how it works and why you need in smartphones 2023-2026

If you are the owner of a Xiaomi smartphone and noticed a mysterious item in the settings of the mobile network v0 LTE (or v0 VoLTE, you might have wondered what it is, why it's needed, and how it affects the quality of communication, unlike VoLTE. LTE), which has long been the standard, the abbreviation v0 LTE It is confusing even for experienced users.

Actually. v0 LTE — This is not a mistake or a typo, but a specific implementation of voice transmission technology over networks. 4G, This is the model that Xiaomi uses in some models for regions with special coverage (for example, China, India, Russia). v0 LTE It differs from classic VoLTE, how to turn it on or off, and what problems can arise when using it – and how to solve them.

Spoiler: if your smartphone Xiaomi suddenly stopped ringing after the update or change SIM-This is the setting that may be the culprit, but don't be too quick to turn it off, in some cases. v0 LTE Improves the stability of the connection!

What is it? v0 LTE Xiaomi: decoding and technical details

v0 LTE (sometimes referred to as v0 VoLTE or VoLTE v0) — This is a proprietary modification of VoLTE technology, developed for Xiaomi smartphones (and some other Chinese brands), designed to work in networks where standard VoLTE (voice on the Internet) is used. LTE) It is not supported by the operator or is not stable.

The main difference from the classic VoLTE:

• 📡 Adaptive protocol: v0 LTE It can automatically switch between VoLTE and 3G-vocally (CSFB) depending on the quality of the network, while standard VoLTE requires stable 4G-covering.
• 🔄 Support for hybrid networks: Works even in regions where the operator has not fully switched to the network. IMS (IP Multimedia Subsystem – System required for VoLTE.
• 🛠️ Built-in optimization: In firmware MIUI for v0 LTE Added voice compression algorithms that reduce network load when a weak signal.

In fact, v0 LTE — It is an intermediate solution between the obsolete 3G-vocally (CSFB) It was created because in some countries (for example, China) operators migrated from the country to the country for a long time. 3G on 4G, Xiaomi needed technology that would work in both standards without interruption.

It's important: v0 LTE It is not an official standard. 3GPP (This is a branded development of Xiaomi, so you won't find it in smartphones of other brands.

Differences v0 LTE voLTE, CSFB and ViLTE: Comparative table

To better understand than v0 LTE It is different from other voice technologies, so let’s compare their key features:

As you can see from the table, v0 LTE It is an intermediate position between VoLTE and CSFB. It’s not as fast or stable as a full-fledged VoLTE, but it’s significantly better than the old one. CSFB, Especially under conditions of imperfect coverage.

💡

If your operator officially supports VoLTE, but in a Xiaomi smartphone calls go through the Internet v0 LTE — This is a sign of incorrect network settings or outdated firmware.

How to turn on or off v0 LTE Xiaomi: step-by-step instructions

In most Xiaomi smartphones (for example, Redmi Note 12, POCO X5, Xiaomi 13) setup v0 LTE It's hidden in the menu of the mobile network. To find it, follow these steps:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Go to Network Type or Network Settings (name may vary depending on version) MIUI).
4. Find the VoLTE or Voice via LTE.
5. If there is a sign next to the switch v0 or v0 LTE — That's the right option.

In some versions (especially in Chinese versions). MIUI) path may differ:

Settings → Param. SIM- Maps → Call settings → VoLTE Mode

If the paragraph v0 LTE No on the menu, that could mean:

• 📱 Your smartphone doesn’t support this feature (relevant for older models until 2020).
• 🔄 The option is hidden and requires activation via ##4636## (engineering menu).
• 🌍 Your region does not require your use v0 LTE (In Europe or the United States, where VoLTE is stable).

Is VoLTE mode enabled in the settings|

Is there coverage? 4G in your region|

Does the operator support VoLTE (check on the website)|

Is the firmware updated to the latest version?-->

Attention. ⚠️ After inclusion v0 LTE Mobile phone calls are missing or stopped, try:

1. Reboot the smartphone.
2. Manually select the operator network in Settings → Mob. → Network operators.
3. Reset network settings (Settings) → Memory. → Reset → Resetting network settings).

Problems with v0 LTE Xiaomi: Why it doesn’t work and how to fix it

Despite all the advantages, v0 LTE It can cause disruption, especially if the smartphone is used with SIM-And we're going to look at a map of an operator who hasn't optimized their network for this technology.

1. Calls are cut off or fail to pass

After inclusion v0 LTE Calls are dropped after a few seconds or do not connect at all, the reasons may be the following:

• 📵 Weak signal. 4G: v0 LTE requires stable coverage LTE. If the signal is weak, the smartphone will try to switch to the 3G, cliff-prone.
• 🔧 Incompatibility with the operator: Not all operators support proprietary solutions Xiaomi. v0 LTE It can conflict with VoLTE settings from MegaFon or MTS.
• 📲 Outdated Firmware: In Older Versions MIUI (below 12.5) were bugs with work v0 LTE, which have been corrected in new updates.

Decision:

1. Turn it off. v0 LTE Check if the calls are working. 3G (CSFB).
2. Update your firmware to the latest version (Settings → About Phone → System Update).
3. Contact the operator and see if they support VoLTE for your Xiaomi model.

2.The battery goes down fast.

If, after activation, v0 LTE The smartphone began to discharge much faster, the reason for this is the constant switching between the two 4G and 3G. Unlike the classic VoLTE, which only works in the LTE, v0 LTE It can “hang” in intermediate states, which increases energy consumption.

Decision:

• 🔋 Turn it off. v0 LTE Use standard VoLTE (if the operator supports the service).
• 📴 Enable battery saving mode (Settings) → Battery → Savings regime).
• 🔄 Restart your smartphone – sometimes the communication module “hangs” in an active state.

3. No VoLTE icon or v0 LTE status-line

If you're on. v0 LTE, But there's no badge in the top panel. HD, VoLTE or v0, It doesn't always mean that the function isn't working. MIUI The indicator is not displayed, although calls are made through the LTE.

How to check:

1. Call another phone and listen to the quality of the communication — v0 LTE work.
2. When you call, check if the mobile Internet is still active. If so, you are using VoLTE or v0 LTE.
3. Install the NetMonster app or 4G Google Play Mark will show you which protocol the call is using.

💡

After the update MIUI lost VoLTE, try resetting the network settings: Settings → Memory. → Reset → Resetting mobile network settings. This often helps to return the icon HD status-line.

v0 LTE Xiaomi: Who supports and who does not

Not all Xiaomi smartphones are supported v0 LTE. It is generally available in models released after 2021, primarily in devices for the Chinese and Indian markets:

If your model is not in the table, check the support as follows:

1. Open the engineering menu by dialing ##4636##.
2. Go to the tab Information about the phone.
3. Look at the line VoLTE provisioned. v0 Or enabled – your smartphone supports the technology.

Attention. ⚠️ On some models (for example, Xiaomi Mi 11 Lite) v0 LTE It may not work properly with two SIM-If you use Dual-SIM, try disabling the second card and check the stability of the connection.

How to improve communication quality in use v0 LTE

If v0 LTE It works, but the quality of calls leaves much to be desired, try the following optimization methods:

1. Update the firmware to the latest version

In the new versions MIUI (14 and newer) significantly improved support v0 LTE, Added fixes to work with Russian operators:

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

2. Manually select the operator's network

Sometimes the smartphone is not connected to the most stable network, but to the first one that comes along.

1. Open the Settings. → SIM-maps and mobile networks → Network operators.
2. Turn off Automatic Selection.
3. Select your operator manually (e.g. MTS)-RU or Beeline RUS).

3. Turn off power saving for the communication module

Battery saving mode can limit the mobile network, causing calls to stop.

1. Go to Settings. → Battery → Energy conservation.
2. Press the Energy Saving Settings.
3. Find the item Background Limitation and add the Phone app to the exceptions.

4. Reset the network settings

If the problem started after the update or change SIM-Maps, resetting network settings often helps:

Settings → Memory → Reset → Resetting mobile network settings

After resetting the smartphone will restart, and the settings v0 LTE re-introduce.

💡

If after all the manipulations the calls still stop, try to turn off. v0 LTE And you can use standard VoLTE, and 90 percent of the time, the problem is carrier incompatibility, not the smartphone itself.

The future v0 LTE: Will the technology remain in the new Xiaomi smartphones

With the transition of operators to 5G and widespread use of VoLTE relevance v0 LTE In the new flagships of Xiaomi (for example, Xiaomi 14 or Redmi). K70) This technology is either missing or works in the background as a backup option.

Nevertheless, v0 LTE It will be used for some time in the:

• 🌏 Budget models for emerging markets (India, Indonesia, Latin America) where coverage 4G unstablely.
• 📱 Smartphones with Chinese firmware (MIUI China, where the function is enabled by default.
• 🔄 Two-device devices SIM-cards where one of them does not support VoLTE.

In the long term, Xiaomi plans to completely switch to standard VoLTE and 5G SA (net-wire 5G), voice-transmitting IMS No need for intermediate solutions, but for owners of older models (released before 2023) v0 LTE It will remain relevant for another 2-3 years.

Attention. ⚠️ If you buy a Xiaomi smartphone from hand or imported from China, make sure it has VoLTE support for your carrier. K60 The Chinese market may not work with the Russian SIM-map-to-card v0 LTE free-of-set.

FAQ: Frequent questions about v0 LTE Xiaomi