Can VOLTE only be opened with 4g network to make phone calls and send text messages?

Let me answer the questions of this industry.

With the introduction of VOLTE mobile phone, you can make phone calls and send text messages on the 4G network.

VOLTE is a voice solution on 4G(LTE).

LTE itself belongs to a pure data network and has no circuit domain, so it cannot carry voice and short message services. However, with the development of technology, VOLTE technology based on IMS(IP Multimedia Subsystem) is introduced into LTE network, and voice and short message services are carried on LTE.

When using VOLTE, the mobile phone must meet the requirements that the network supports VOLTE function, the mobile phone terminal supports VOLTE function, and the VOLTE switch is turned on.

At present, China Mobile's 4G network has realized the commercialization of VOLTE service, while China Mobile has also opened the VOLTE function to 4G users by default, and mobile users can use the VOLTE function by directly turning on the VOLTE switch on their mobile phones.

At present, China Telecom's VOLTE service is in the trial commercial stage, and users need to apply for this function by themselves.

The trial commercial area of China Unicom VOLTE is relatively small, and the trial commercial is only opened in some provinces and cities.

Mobile phones with Volte function all make calls and send and receive short messages on the 4G network under the coverage of base stations supporting Volte function.

Contrary to what some people say, as long as your mobile phone is a Volte mobile phone, whether the other party uses Volte or not, whether the other party is a fixed line or a mobile phone, whether it is a local network user or a cross-network user, your phone and SMS are all carried on the 4G network. The only difference is that only when both parties are the same operator and both use Volte can they enjoy HD voice calls and HD video calls.

Only when the coverage of 4G in this area is not good, Volte phones will be downloaded to 2/3G networks through CSFB (Circuit Switched Backoff) and SRVCC/eSRVCC (Single Voice Continuity/Enhanced Single Voice Continuity).

It should be pointed out that China Telecom's 2/3G network is CDMA. Because CDMA2000 and LTE are incompatible, VOLTE mobile phone can't switch to 2/3G network, so it can only drop the call.

In short, the voice and SMS services of Volte mobile phones are always carried on the 4G network, and only in areas with poor 4G coverage will they switch to other standards.

VoLTE high-definition voice is enabled on 4G network, and 4G stops making phone calls, videos and sending short messages. All services on mobile phones carry IP data on 4G network, providing higher and faster bandwidth rate, more stable network signals, lower delay voice connection efficiency, and faster and shorter 4G high-speed Internet access service.

Just turn on the phone settings. Generally speaking, 4g comes with volte.