No Mark I didn't try at the windows. I did try at Trail Crest and on the summit.I tried several places on the MWMT and never found the magic spot. Funny I was in the parking lot at the portal and was talking to my wife and turned sideways and the call dropped. I was never able to get a call out after that no matter where I stood even though I had a few bars saying I had service.That was a few phones ago so maybe my new phone will work better.Hope to be able to make a call from the summit sometime this year.