Why are millions of Viettel customers 'addicted' to quality voice services (VoLTE)?

New service satisfies all customers

High quality VoLTE calls with features that are completely superior to regular calls.

Working in the mountainous district of Que Phong, the mobile phone has become a “close friend” that helps Ms. Phan Thi Hao connect with her relatives. Therefore, wishing to be more convenient and closer to her family, Ms. Hao chose to use VoLTE voice service to upgrade call quality. Since VoLTE has been with her, it has helped her shorten the distance and ease her homesickness.

“VoLTE has helped me hear my parents' voices every day through my smartphone, clearly, clearly, and more realistically and warmly, as if my loved ones were sitting right next to me; giving me a feeling of closeness, comfort, and peace of mind when living away from home,” Ms. Hao shared.

Also choosing the VoLTE voice service, because he often works on construction sites, Mr. Huy Binh (Quan Bau Ward, Vinh City) always encounters obstacles when discussing work over the phone. Mr. Binh said, before, every time I needed to contact by phone, I had to go far away, find a quiet place to hear clearly, which was very time-consuming and annoying. Since using the VoLTE voice service, I can easily hear calls right on the noisy construction site, without being mixed with background noise; work is much more convenient and smooth.

The reason why VoLTE voice service has outstanding advantages in quality, VoLTE calls meet HD Voice standards, bringing an unprecedented impressive calling experience to users.

Because in the past, standard calls only used a narrow audio frequency range (narow band), around 300Hz - 3.4kHz. But with VoLTE, the audio frequency range is expanded (wide band) up to 50Hz - 7kHz, upgrading the call to high definition (HD Voice Call). VoLTE's bandwidth is not only twice as large as old calls, but also closer to the 80Hz - 14KHz frequency range of the human voice (Human Voice). As a result, VoLTE calls capture both high and low tones, as well as the speaker's timbre.

VoLTE with double the frequency range also helps filter out noise and reduce interference. In particular, VoLTE is very good at reducing echoes. If you have ever been annoyed by echoing calls, echoes, abnormal echoes..., with VoLTE, this almost never happens.

In addition, VoLTE also has other outstanding advantages that convince even the most demanding customers.

It is almost instantaneous call connection time.VoLTE takes advantage of the superior high speed of the 4G network, the data transmission delay (Ping) over the 4G network is only 10-25ms, much less than the 100ms of the 3G network. Therefore, the VoLTE call connection time only takes 2.7s, instead of 6s as before. The bell rings almost immediately after pressing the call button, soothing the "impatient" mentality of busy people who need to make many calls.

Can use both voice and internet access at the same time. Completely different from usual, when using VoLTE, users can completely use parallel phone calls and access other internet applications on the phone. This completely outstanding advantage is very suitable for busy people, who can both contact the phone to discuss work, and simultaneously check mail, messages on OTT at the same time...

Save battery more than usual. VoLTE takes advantage of the high speed of 4G networks, saving battery resources compared to calls on the old 2G/3G platform. Previously, Nokia Smart Labs evaluated the performance of this voice service and found that VoLTE consumed 30-50% less battery than regular VoIP (Voice over IP) calls.

Currently, Viettel 4G has covered 95% of the population, 100% of 4G transceiver stations use the most modern 4T4R technology (4 transmit, 4 receive) in the world. Therefore, the network operator's VoLTE service not only ensures stability, but also helps the phone save more battery. For those who often "cook porridge" on the phone, this is indeed a very optimal technology.

Free to register and use. Free is one of the factors that makes users rush to use high-quality voice services. VoLTE Viettel is free to register and use, does not consume any data capacity. Users only pay per minute fee, like regular calls today.

Global mobile calling trends

Conditions for using VoLTE high quality voice service.

VoLTE is the global mobile calling trend in the coming years. More than 100 of the world's largest carriers have "rolled out the red carpet" for users.

VoLTE (Voice over LTE) is a high-quality calling service that first appeared in Vietnam, deployed by Viettel. Although it has not been widely promoted, only "quietly" texting customers to know, Viettel's VoLTE service has reached millions of users, in Nghe An alone this number has reached nearly 100,000 customers.

If you are a technology enthusiast, quickly register for Viettel's VoLTE service to show your pioneering class and experience the outstanding features of this advanced technology.

VoLTE is the first high quality voice service in Vietnam.