No Onstar in Guerneville period. ATT will work in town but as Onstar is Verizon, I imagine Verizon customers are out of luck also.

Although Verizon has recently revised their website coverage map to show no dead spots in SE Pacifica (back of the valley) that is pure BS. Their coverage has NOT improved and I STILL have "No Service" at my house (and that's when I'm standing outside in my driveway, NOT inside the home). Verizon's cell towers are all located "over the hill" someplace in San Bruno and their coverage for those of us in the "shadows" of the hills in Pacifica is extremely limited. My phone only works at the top of hills (like Fassler) or when I'm on Linda Mar Blvd.or Hwy. 1. If you want service "back in the valley," find a carrier other than Verizon... their coverage sucks here.

a contract to share roaming with another carrier on a cel tower in rockaway expired in Nov. 07. ever since those of us on roberts rd and I believe up rockaway ave have been cut off from receiving any service.

Once you get west of Las Gallinas, there is nothing. In a rare case, you might get a bar or two, but only for a second.

Sprint is unusable in the Montclair hills area. The only thing that gets through, sometimes, is text messages.

AT&T in Dec 2007 decided not to add a western hills tower, as their user map doesn't have enough phone lines to justify the costs. In this area of Cupertino recommend Verizon... 5 bars.

Almost zero incoming call reception - 99% of calls go to voice-mail with "call missed" notice.

Reception here is terrible, if it wasn't for the contract I would've switch to another carrier already.

My T-Mobile phone is nearly useless in the North Tahoe / Truckee area. I get spotty coverage in Tahoe City, usually wait until I'm at Squaw Valley to make calls.

Feb 6,2008 - Last 3 years reception was broken but doable, stopped altogether last week. After many minutes with AT&T's nice customer and tech service people. I was informed AT&T used to share towers with TMobile in PV, but around Jan 24th, they decided to go solo. The plan is to sacrifice some customers while improving the service for others(! - novel concept in customer care), no notification, nothing. They will let people off contracts, per instructions read to me over the phone. No information regarding future service available. Suggestions, let's find a better carrier for this area and let's all give him our business. Do most of you suggest Sprint?