Hello

I've had an S21 Ultra (SC-52B) since last Spring. I  only use International SMS rarely  and everything was working fine, but now messages sent from overseas are not getting to my phone. (Domestic SMS both send and arrive no problem)

Just a bit of geographical background. I am actually in Japan and trying to receive SMS from the UK. Samsung doesn't have a big presence here and they don't have communities like this which is why I'm asking here.

I have spent hours on calls to my phone provider and they've run through the usual checks and found no obvious reason for this.

The phone came with the provider's own message app (called +Message) as default, but I've also tried using Messages from the Play Store and it's the same problem.

Suddenly not receiving International SMS seems like such a specific problem that I was wondering if I'm missing some kind of setting/check/update.

Thanks in advance.