I was dumbfounded that I didn't have coverage at the summit with ATT. Just a couple days before I summited whitney I had coverage above Horton Lakes @ 12k; great cell reception and able to text my wife. At whitney I had no reception at the summit or anywhere along the trail. I guess their cell network isn't too great when you get too far from 395.
People with verizon were getting reception but only at one specific spot.
So true. However, AT&T's coverage in Death Valley is excellent. Really makes you scratch your head.
