sir, network provider JIO told to update my mi max 2 handset..how can I update my mi max handset.. ...
Actually the VoLTE software has been tweaked for working on background instead of foreground.
Means all the phone which has VoLTE active they don't require any active data connection now if you have VoLTE enabled then does not require you to access data connection. It runs in the background and transmits the voice calls in data packets. I don't have the technical knowledge about how it will work but my Vivo V5s works flawlessly and it even works when I use Wi-Fi for data.
I am not sure about which updates they are asking about. Please ask the what update they are talking about