volte still cant use..my coverage already Lte

my volte still cant use..after update,the volte setting showup again..thanks a lot..but why my volte still not working?
0
my volte still cant use..after update,the volte setting showup again..thanks a lot..but why my volte still not working?
Comments
Hi!
Have you checked with your service provider in case there's something in their system?