Here's a summary of comments above, along with information from the Park Service FAQ and another website.
ATT: pretty good in Yosemite Valley, and to Half Dome (2009)
Verizon: Yes (2009)
Sprint: Roaming (2008)
Verizon: Yes in TM campground and area (2009)
ATT: spotty along Tioga Road (2 bars) (2009)
ATT: never (2009)
ATT: good reception (2009)
Sprint: (my guess is they use Verizon to roam here)?
National Park Service FAQ
ATT & Verizon: "Will my cell phone work in Yosemite?
"Digital cell service is available in and near Yosemite Village and Tuolumne Meadows to AT&T and Verizon customers (you may get a weak signal elsewhere in Yosemite Valley, as well). Verizon customers may receive service near Wawona and Crane Flat"
http://www.cellreception.com/coverage/c ... page1.html
- Code: Select all
Carrier Avg Rating Comments Towers
AT&T 2.67 3 AT&T Towers
Verizon 2.5 4 Verizon Towers
Sprint 2 2 Sprint Towers + Verizon roaming
T-Mobile 0 1 T-Mobile Towers
Virgin Mobile 0 1 Sprint Towers
Note: Sprint uses Verizon to Roam.
Note2: Virgin Mobile uses Sprint Towers, but unlike Sprint, does NOT roam.