If you must do it, it looks like you can save a bunch by buying the phone for full price and then paying as you go. This is a new offering, but it does reveal how much the subscription model adds to the cost
Sprint Violates AT&T's Virginity
Here it comes AT&T and Verizon....
Virgin Mobile USA, a prepaid brand of Sprint (S: 2.74, +0.02, +0.74%), on Thursday announced it will offer the Apple (AAPL: 571.72, +0.26, +0.05%) iPhone on a no-contract basis to customers starting on June 29, but you may want to think twice before jumping ship from your current carrier if you're already an iPhone owner.
The "garf" is that you're going to have to pay cash for the phone -- in this case, $549 or $649, depending on the model you want. No subsidy.
But.... the plan is $35/month for 300 minutes of voice and unlimited text and data.
Now consider that over two years if you buy the phone from AT&T it breaks down like this:
$199 up front for the iPhone 4S
$39.99/mo for base 450 minute service
$30.00/mo for 3gb of data
$20.00/mo for unlimited text messages
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$89.99/mo * 24 months = $2,159.76 + $199 = $2,358.76 over two years
Now on Virgin, it's $649 up front and then $35/month * 24 months, or $1,489.00 over two years.
Want to pay an extra $869 plus additional taxes and fees on the AT&T service that are billed separately but not on Virgin, which simply charges sales tax (this can easily be $200 or more over those two years.)
Go right ahead.
For everyone else just tell AT&T and Verizon to***** off.
Disclosure: The author has a speculative position in Sprint (S)