Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
during the two years of contract, even if just being unoptimistic for apples side, apple probably receives 300-500$ per sub, at least they should if iphone is subbed in the same range like other handsets.
250 000 x 400$=
100 000 000... so..
apple chose the business model of uber-lock-in and monthly payments.