I carry a map and a compass. Not real high-tech, but no batteries are required so I save weight. Not being a gram nazi, I don't even cut the maps down, so if I do get lost I am still probably on the mapsheets. Also, I've never seen a compass fail to get a signal. And the maps now are almost good enough to be loaded into electronic devices, except the maps are much lighter and don't require batteries or a PHD in electronics to operate.

I have a PLB in case I get hurt, but as I seldom (read that as never) solo, unless both of us in the party are hurt and immobile, I guess I won't be using it. I don't own a cell phone or satphone. I do have some walkie/talkies, but as my partner and I seldom stray out of shouting range, I won't carry them either.

Primitive is sometimes better.