>- Cannot add a second phone but can add a tablet. As soon as it detects a SIM card slot (with or without SIM in it) it only allows you to set it up as the primary device, rather than a secondary like a tablet.
This is so infuriating. I can have Signal with the same account on my phone, my macbook pro, and my windows desktop, but not my iPad Pro. It doesn't even have a SIM card in it. Just an empty slot.