When I summited last Summer, I couldn't get service with ATT. But another person had Verizon and I called my wife with his phone.
He let several people use his phone for calls. Whoever he was....thank you.
p.s. I couldn't even get service out of Lone Pine with my phone.
I also have AT&T and have had similar experience on the summit but find I can usually use it at the Portal.
In years past I've had good luck with TracFone. You might blow $20 bucks on one if it's essential you call from MW and you don't have Verizon. I think they're still available at K-Mart.
