Simon Mason wrote

Tried my new IRIDIUM 9555 satellite phone today and although
I could get a signal in my conservatory, reception was garbage,

Yep, they are that ****ed. And dont work at all inside the house.

If your smartphone was that ****ed, you'd return it.

https://pbs.twimg.com/media/CxjyQ9MWEAAVZQQ.jpg:large