Horace Dediu of Asymco is good with numbers and his latest work uses this skill to look at discarded iPhones in the US. Dediu takes monthly comScore data and quarterly activation data provided by the wireless carriers to calculate the install base of the iPhone in the US. His number crunching and resulting graph shows the number of new activations and the calculated number of iPhones being put out of service each quarter.
According to Dediu, the discard rate, which is the number of phones being discarded over the number of new phones, is 50% in the US. Most of these discards are coming from AT&T as Ver
