What is "dual 4G", and what is "dual VoLTE"?

Question

Hi, what will be happened to 4G subscriber in absence of 4G network. Will he/she latch to 3G network? Especially in Punjab where 3G network is not available?

Answer 1

As the name suggest , your phone's SIM card can have dual 4G connectivity. few years back if you can remember smartphone came up with 2 card slot, in which one slot SIM will be of 4G connectivity, and other one will be in 2G/3G spectrum. Some UE chip vendors like QC, Media Tek, came up with new mobile chips in which your both SIM card slot sim can have 4G connectivity.