{"id":202701,"date":"2025-09-12T12:19:20","date_gmt":"2025-09-12T10:19:20","guid":{"rendered":"https:\/\/olin.es\/blog\/volte\/"},"modified":"2025-10-22T09:53:25","modified_gmt":"2025-10-22T07:53:25","slug":"volte","status":"publish","type":"post","link":"https:\/\/olin.es\/en\/blog\/volte\/","title":{"rendered":"What Is VoLTE and How Does It Improve Your Calls?"},"content":{"rendered":"

Have you heard about VoLTE<\/strong>? It lets you make voice calls using the 4G network. Sounds simple, but behind it lies a big shift in how your voice travels through the mobile network. Let\u2019s take a closer look at what VoLTE is, how it works, and why it improves the overall calling experience.<\/p>\n

What Is VoLTE?<\/h2>\n

VoLTE (Voice over LTE)<\/strong> is a technology that enables you to make voice calls over the high-speed 4G (LTE) network. In practice, this means faster connections, HD-quality voice calls<\/strong>, the ability to use data and voice simultaneously, and improved battery efficiency.<\/p>\n

With VoLTE, voice calls no longer travel through the old 2G or 3G networks\u2014they\u2019re transmitted over the same 4G network you already use for browsing.<\/p>\n

A key point: VoLTE calls don\u2019t consume your mobile data.<\/strong> Even though they use 4G, they\u2019re managed as a separate service within the operator\u2019s network.<\/p>\n

How Does VoLTE Work?<\/h3>\n

LTE (Long Term Evolution) was originally designed for data only, not voice. To overcome that limitation, engineers developed IMS (IP Multimedia Subsystem)<\/strong>\u2014a framework that allows voice and other services to be delivered over IP. VoLTE is based on this system.<\/p>\n

Practically speaking, unlike traditional calls, when you make a VoLTE call your phone sends a signal to the operator\u2019s IMS server, which then establishes the connection between the caller and the recipient.<\/p>\n

That server also negotiates audio quality<\/strong>, usually using advanced codecs like AMR-WB (Adaptive Multi-Rate Wideband)<\/strong>, which enables HD Voice<\/strong>. The difference is clear: in 3G networks, voice frequencies ranged from about 300 Hz to 3.4 kHz. With VoLTE, calls can cover up to 7 kHz or more\u2014making voices sound much closer to how they do in person.<\/p>\n

VoLTE also avoids network switching<\/strong>. Before, a 4G phone had to drop down to 3G to make a call\u2014a process that took several seconds and drained the battery. With VoLTE, everything happens within 4G, seamlessly and efficiently.<\/p>\n

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Advantages of VoLTE<\/h2>\n

Here are the main benefits of VoLTE technology:<\/p>\n