http://www.theregister.co.uk/2015/09...e_calls_volte/
"The combination of both lower and the higher frequency spectrum (1800MHz) which Three currently uses means customers will benefit from the advantages of each, meaning improved indoor coverage, less blackspots, and better call connections."
The article itself has a few errors but there you go.
"The combination of both lower and the higher frequency spectrum (1800MHz) which Three currently uses means customers will benefit from the advantages of each, meaning improved indoor coverage, less blackspots, and better call connections."
The article itself has a few errors but there you go.