Well, you know you will want one of those native Ubuntu phones when they are released.
I got an ANDROiD phone for $240, with no contract from Virgin Mobile. They are owned by Sprint, so if Sprint has service they should too. Its pre-paid, but you can add a CC, bank account, paypal account, and it will automatically top you up at the start of your cycle, so you wont have any of the "out of minutes" situations that pre-paid can have. All the plans have unlimited text and Data. The Data is truly unlimited, but the first 2.5GB per month is full speed, after that they slow it down. That 2.5GB is more than u get from ATT or Verizon, without any overages like u get with them. I pay $35 plus state sales tax for 300 any-time minutes. No free nights and weekends, no roll-over. 1200 minutes is $45, and for $55 its unlimited talk minutes.
It does not work with google voice. I have sent emails and made 2 calls.
I was paying over $100 (105-135) per month to ATT, now I pay under $38, and I have no contract. I am saving a ton of money.
Got a friend, hes taking the $55 plan for him, the $45 plan for wife and $35 plan for kid, and is saving almost $160 per month.
He is now thinking about spending $50 more and getting the fast cable internet I have(he has 6Mbit ATT DSL), and would still be saving over $100 per month versus his old ATT bill
Its not all cake and ice cream. Every once in a while a text does not send, and I have to go into Settings and hit 'Update Profile' which takes about 20 seconds, and your text gets sent in the first 5 seconds of that. My phone also thinks it is Spanish, I am teaching it English. When I would type a word, "Have", for example, my phone would correct it to "Hace" There were quite a few words I had to teach the phone. Not sure if you would have this problems or if its just my phone. My friend is switching end of this month he says, so we will see. He'll have 3 phones.
For me, I'm saving so much money and am free to do what I wish, buy a new phone, change carrier, etc, because I am not in any contract. It is worth the small annoyances.