Death Valley National Park including Panamint Valley and Saline Valley hot springs and Mount Whitney are covered by two cellular base stations. Both are located on high mountain peaks and are operated by Alltel wireless.
Rogers Peak covers most of Death and Panamint Valley. Cerro Gordo Peak covers the Saline Valley and Mt Whitney area.
As of 10/07 Rogers Peak is still analog only. Cerro Gordo now provides Analog, CDMA and GSM.
Verizon Wireless: A Verozn Tri-Mode phone will work in most of Death/Panamint Valley. The Verizon roaming list blocks Cerro Gordo. Panamint and Death Valley Analog are all Verizon users have access to.
Sprint/Alltel: A Sprint Tri-Mode phone will work in most places. Sprint allowes use of both towers. This is Alltels native network.
Cingular/att/T-Mobile(GSM): Coverage on parts of Saline Valley road and 190.
Tips: In inexpensive direct-connect external antenna is a great help. GSM phones have very poor internal antennas and an external antenna is most often the difference between ‘no service’ and a solid call. Get one here.

Hot Spots: The main road that runs through Panamint Valley, good analog coverage. Most all of Badwater Road up to Jubilee pass through Death Valley, good analog.
Saline Valley Road, one mile below lower warm spring. Fair digital and analog. External antenna or yagi will increase reception greatly.
Lee Flat has a great digital signal. Panamint Valley Road has fair cdma digital coverage from Cerro Gordo.

Using Cerro Gordo peak for data/internet at Palm Spring Saline Valley.
Rural Setups/External Antennas