VoLTE full form is Voice over Long-Term Evolution. It means that the calls you make are through the 4g network using the LTE network.
This gives you the ability to make HD quality calls and along with that your calls connect quickly, calls do not drop and the voices also come very clear.
When making calls at the time when VoLTE was not there, you used to call using the minimum bandwidth provided by your telecom operator.
It happens that sometimes your call not connected, there no sound, sometimes the call dropped along with that the quality of the call very poor.
Suppose you used to take 6 to 7 seconds to make the first call, but if you also use VoLTE, then your connection speed becomes ultra fast. Your call connects very soon.
If you make a VoLTE based network calls, your network gives preference to it to transfer your call across the network. This gives the advantage that your call does not drop and the call does not delay in connecting.
You hear an absolutely crystal clear voice and the phone with whom you connected can also hear your voice very well.
In the past, whenever you used to call LT, your mobile data used to be turned off and your call would become pharaoh again after disconnection and this used to be very fast.
Nowadays you can keep your internet turned on while making a call. However, sometimes it seen that if you make a call, your data speed also increases.
Need of VoLTE
When we started using mobile phones, the first analog networks used, after digital came, after 2G, and then after 3G.
This is the BASIC standards that telecom operators and all over the world uses. For example, to provide a telecom operator, some minimum criteria have to be followed.
Criteria set keeping in mind the minimum data c speed and different bandwidths. For example, to provide 3G some minimum criteria followed by the telecom operator.
As we went from digital to 2g, 2g to 3g, and then 3G to 4g the telecom operator took care of data speed only.
But the telecom operator did not pay attention to the call quality at that time which is the main function of a mobile phone.
To improve the quality of the call, the use of VoLTE was started. The VoLTE used to make calls using the 4G data network, thus giving the user a quality call.
What is the specification needed to use?
You should have a handset that supports 4g and also supports VolTE along with it. Whatever telecom operator you are using, it should have 4G service as well as VoLTE service.
The most important thing is that the person you are calling should have a 4g VoLTE phone, their network should also be VoLTE based.