Hi, I have the same problem but I'm on an eSIM. Would I replace that??
As I noted above, It seems to be some kind of delay around sound being recognised, recorded and dispatched so the first few milliseconds of whatever you say is not transmitted. I'm also Samsung and Three.
I have to keep a sound flow going between the digits to get them through, which means I'm very out of breath at the end of a long number!
