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AT&T service in mammoth lakes is very bad. Number of bars and coverage is fine, but on weekends and holidays you can not place a call, send a text, or use data (based on 8 years and over 40-50 days / year). This weekend just as bad. Can not receive calls or text either (messages can take a day or 2 to get to your phone). So even if you have 5 bars, you won't be able to use your phone. Called AT&T customer service. Clueless! Over past 5 years, most people I know have switched to Verizon due to this problem.

ATT has def. stepped it up. THANKS I can now use my phone with no worries about dropping calls! I love MAMMOTH and I love AT&T!

I was about to change to Verizon, but ATT must have put up towers in Mammoth. The reception up here is perfect. I've only had one dropped call and I think it was on the other end. ATT has really made an effort to give Mammoth coverage in town and throughout the residential areas and the ski area. 3 months ago I would have given ATT a very poor rating, but I just signed on for another 2 years...

AT&T in the Mammoth Lakes area is terrible. On weekends I will have full service and I still get the "call failed" message. Even with full 3G. At my house I have "no service" and in my driveway and backyard have very minimal service. If you come to Mammoth during a holiday or weekend you might as well turn off your phone. Over xmas break I had no service for a week. Even during busy times during the summer the whole AT&T network seems to "lock up" and do not work at all. This needs to be fixed!

Came here once and got full bars 3G, but that was during the week. This past weekend (Thurs / Fri / Sat / Sun) was lucky to get about 20 mins of Internet via Edge. The rest of the time, all I got was "o" which gave me no Internet. Oh yeah, and the time was always two hours ahead. WTF AT&T? Pretty convinced to switch to Verizon, as I get practically no voice reception north of Mammoth to Sonora Pass, and none south of Mammoth until Bishop. Internet is unusable until Ridgecrest (about 3 hrs away from Mammoth).

AT&T coverage in Mammoth, Tom's Place and Crowley is HORRIBLE! At the very least they should have good coverage in Mammoth but I might as well have turned my phone off as it was useless for the week I was up there. Occasionally I would get a signal but as soon as I saw it, it was gone. It's 2010... come on AT&T, get on the ball and build your network out! I was thinking about maybe moving back up there but if I do, I'll be switching to probably Sprint. Actually I'll probably be switching anyways since even in the flatlands AT&T coverage is not that great.

Abslutely terrible. AT&T should be ashamed. People who live in this town are switching to Verizon en masse. If you live or travel to Mammoth Lakes often DO NOT USE AT&T!

AWFUL AWFUL AWFUL. Dangerous. Poor reception in the best of times. no email. Don't count on being able to use it. My iphone is now a simple address book for use with my new Verizon phone. ATT and Apple better wake up quickly.

ok when the town is empty. Zero service om weekends

No service over the xmas holiday, continually dialed out with full bars but no connection, even tried 611 for help but could not get out. Finally got service about Bishop area.

Works just good enough. But when you really need service for that important call, you can almost always bet on it not getting good reception! and some times the time just changes to 2 hours ahead of the actual time making the alarm clock useless.

Motorola V 551 (Cingular GSM) works great in LA area. In Mammoth reception is spotty at best. My old Motorola V60 (ATT TDMA) worked great in LA area and Mammoth.