Cingulair... I was like 1 mile out in the ocean and my friend called me, and she could hear me loud and clear. !@#$%^&*, I had 3 bars even. My buddy's T-Mobile lost signal before we even left shore. Just as we got down to the ocean, it lost it... lol. Customer Service has been great. Everytime I call, no issues. The stores on the other hand are meh, so i'll stick to the phone. !@#$%^&*, my phone stopped working, and I didn't have insurance, but they still gave me $60 towards a new phone, since if I had had insurance, that's what it would have cost them or some !@#$%^&*. I forget, but yeah. Have had them for coming up on 2years now (reminds me, I need to find my new upgrade phone), was AT&T Wireless before them, and both are great, and even better combined now.