This isn’t going to be the answer your want and here’s why: We simply can’t know what will happen or when. That said, things like getting in touch with other people (especially over longs distances) may be difficult, if not impossible. Spare cells are good for BT comms (i.e., Briar); walkies are good for a very short distance; and hams are going to get you places, but maybe not nearly as far as you might need. Sat phones are great if you’re rich and can afford it -and if the stars haven’t fallen from the sky. While I’m here, if you’re facing a shtf situation, no one will care much about who’s authorized to use a ham. In a grid down situation, you’re going to have to contend with the extent to which comms are out. Is it local? Is it city-wide? State? Is it nation-wide? Is it global? You may not know. You may never know! We might just have to do things the old-fashioned way. And that’s going to require tremendous patience on the part of any modern human. Preplan meetings points between you and out-of-town family members. You can start simply like whatever the halfway point might be, then talk about specific meeting places – like place just outside of town that burned down, a park, or a parking lot with a line of sight. Talk about what situations would force you to BO, discuss possible routes each party might take (general vicinity, direction, etc -in case roads are blocked), and preplan establishing comms for when you may be in range of each other (check your ham radio at 12noon every day or sunrise or sunset, whatever). Come up with a call and response, so both parties know you’re not compromised – kinda like a duress code. I know a lot of this seems kinda ridiculous, but consider how difficult things will be without technology, or even the transportation that depends on that technology. What if you have to ride a bike to your meeting point? What if you have to hoof it? How long will it take? What if roads and trails are blocked or unpassable? Consider that communicating with out-of-town family might not happen at all, or that it might take a very long time.