Or what is VoLTE not cellular? Know the benefits and limitations of this type of fire

Photo of a Galaxy S23 Ultra with a call in progress, with a highlight for the VoLTE icons in the top bar and HD+ next to the call time counter
Photo of a Galaxy S23 Ultra with a call in progress, with a highlight for the VoLTE icons in the top bar and HD+ next to the call time counter
Active VoLTE with HD calls on Galaxy S23 Ultra (Image: Lucas Braga/Tecnoblog)

VoLTE is a type of voice connection that uses 4G networks for data transmission. Its main benefit is allowing high quality calls (HD). The use of VoLTE is conditioned on the service offered by the telephone operator.

Neste artigo, or Technoblog explains how non-cellular VoLTE calls work, as well as listing the advantages and limitations of the technology. Understand what the acronyms VoLTE 1 and VoLTE 2 mean, how to charge calls via 4G, among other details.

What does VoLTE mean?

VoLTE is an acronym for Voice over LTE, also known as Voice in LTE networks (Long Term Evolution). This is a mobile network platform that enables conventional voice calls on 4G networks.

Without VoLTE technology, a smartphone needs to use 3G or 2G technologies to make and receive calls from the operator. Originally, 4G technology was restricted to high-speed data communication, without offering voice services.

The first commercial network with VoLTE was activated in 2012. In Brazil, the technology began to be implemented in 2017. Operators began to adopt VoLTE after releasing the 700 MHz band for Anatel, once it frequently allows for greater coverage of signal and guarantee greater stability in voice calls.

Why does VoLTE 1 and non-cellular VoLTE 2 appear?

If your cell phone displays the status VoLTE 1, VoLTE 2 or just VoLTE, it means that the smartphone is capable of making and receiving voice calls using 4G.

The VoLTE 1 and VoLTE 2 devices are associated with the chip (SIM Card) of the cell phone. The VoLTE icon 1 indicates that the operator of chip 1 provides 4G calls, the VoLTE icon 2 indicates the same for chip 2.

How do VoLTE calls work?

VoLTE connections use the data network for voice transmission. The call works digitally, similar to VoIP technology, such as connections via WhatsApp or Skype.

The VoLTE mechanism is different from previous technologies, as these are called circuit switching, which depends on dedicated lines to establish communication between the speaker and the receiver.

In VoLTE technology, communication between the smartphone and the operator occurs through a high-speed data network (4G or higher). To make a call, the cell phone needs to connect to dedicated servers with IMS (IP Multimedia Subsystem) technology.

To improve the reliability of the links, the operator networks prioritize data transmitted for VoLTE calls in relation to other applications, such as mobile internet. Also, some companies prioritize the use of VoLTE in lower frequency bands, such as 700 MHz, which guarantee greater coverage.

Although VoLTE is data-based, the use of voice calls via 4G does not deduct the mobile internet data package. Among benefits such as better quality and energy consumption, VoLTE technology allows operators to reduce spectrum from previous standards and prioritize more recent technologies, such as 4G and 5G.

VoLTE consome data from the franchise of mobile data?

No. Despite using the data network to make calls, the connections made using VoLTE technology do not contain data from your mobile internet package. Charging for VoLTE calls follows the same rates for connections made with 2G and 3G technologies.

Does every operator support VoLTE?

No. Currently, Vivo and TIM offer VoLTE technology for all of their customers. Claro offers VoLTE with restrictions: only users of post-paid plans with access to technology.

VoLTE technology is not available in various virtual operators (MVNOs) in Brazil. In these cases, the smartphone must use 2G or 3G networks to make voice calls.

People in the link (illustrative image: Pixabay)
People in the link (illustrative image: Pixabay)

Does VoLTE support video calls?

There is ViLTE technology, which uses the same VoLTE resources for video calls. However, the pad is rarely used and is not supported by all smartphones.

Can you make HD calls without 5G?

Yes, it is possible to make HD calls on 5G networks. VoLTE technology is compatible with the 5G SA and 5G NSA fathers; Also, the market works for the standardization of the VoNR format, a type of VoLTE evolution dedicated to fifth-generation networks.

What are the advantages of VoLTE calls?

The use of VoLTE offers various benefits for the user, including simultaneous use of data, energy savings and quality. Next, understand better about each of them:

  • High quality ligations: VoLTE technology is compatible with codecs with higher resolution, allowing HD calls with better voice quality.
  • Use of simultaneous dice: VoLTE works on 4G infrastructure, a high-speed data network is continuously available during voice calls.
  • Energy efficiency: VoLTE technology allows longer battery life, once the smartphone does not need to connect simultaneously to a 2G or 3G network to receive links.
  • Indoor coverage: VoLTE can be used with 4G or 5G of 700 MHz, which allows greater signal penetration in indoor environments when compared to frequencies used with 2G and 3G.
  • Links complete faster: Connections made using VoLTE technology begin to click in less than two seconds, while 2G and 3G can take more than five seconds.

What are the limitations of VoLTE connections?

VoLTE limitations include device compatibility, operator availability and plan restrictions. See, below, how each of them can affect your experience:

  • Compatibility: none of the devices are compatible with VoLTE technology, and none of the operators supports all of the devices compatible with the father of calls via 4G.
  • Nem todo chamada is HD: for high quality calls, it is necessary that the operator offers support for HD codecs and both interlocutors need to use the resource.
  • Configuration– Some devices (especially Android models purchased externally) require manual configuration to operate with VoLTE.
  • Restriction of plans: Claro restricts VoLTE technology to customers with post-paid plans, leaving out users with control, pre-paid or Claro Flex plans.
  • Operator Availability: Not all operators offer VoLTE to their customers, requiring the use of 2G and 3G networks for voice calls.
  • Limited international roaming: There are only a few countries that offer VoLTE for international roaming users, and it is necessary to use 2G and 4G networks to make conventional connections.

Can I deactivate non-cellular VoLTE at any time?

Sim. You can disable VoLTE calls in your cellular network settings, forcing the use of 2G and 3G for conventional connections. Although this setting is not recommended, disabling 4G calls may be useful in locations where 4G is congested or not functioning.

What is the difference between VoLTE and Wi-Fi Calling?

VoLTE calls are made through the 4G network, provided by the towers of telephone operators. Wi-Fi Calling (or VoWiFi) is a service offered by operators that allows you to make and receive calls through Wi-Fi networks, without depending on cell towers.

Wi-Fi calls are available in localities served by the Internet via Wi-Fi, but without coverage from the cellular operator or in regions with poor signal.

Or what is VoLTE not cellular? Know the benefits and limitations of this type of fire