This app will check VoLTE status of your phone which is required to make and recieve calls for VoLTE network provider.

What is VoLTE?

VoLTE stands for voice over LTE and it’s more or less exactly what it says on the tin. It's voice calls over a 4G LTE network, rather than the 2G or 3G connections which are usually used.
We tend to think of 4G as mostly being about downloading, streaming and web browsing, and indeed that’s primarily what it’s been used for so far, but it can also be used to improve calls.

What are the benefits of VoLTE?
i. Superior call quality
ii. Improved coverage and connectivity
iii. Better battery life
iv. Video calling

Are there any limitations of VoLTE?
It’s not available everywhere on every network, or on every handset, so you may or may not be able to use VoLTE – we’ve got more information on that below.
But assuming you can use it the only real limitation is that it won’t work when abroad.