I'm a S9+ user and I'm facing weird problem with respect to signal on any operator. Sometime even though there is no signal at specific area it will showcase full signal but when I call someone it wont even connect. Later I should go to flight mode and come back.
I observed this several time. Initially I thought its operator issue so I ported to other operator but same result!.
Kindly look into this issue which is highly annoying.
