iPhone Tops T-Mobile USA's Smartphone Sales as Carrier Expansion Drives Growth for Apple

Research firm Kantar Worldpanel has released a new report (via The Next Web) highlighting U.S. smartphone sales over the March-May period, finding that Apple's share of the market rose by 3.5 percentage points compared to the prior-year period. The report attributes that growth to the iPhone becoming available on T-Mobile USA, the last of the four major U.S. carriers to begin offering the device.

Consequently, with Android remaining unchanged (+0.1%) to date this year, the gap between the two leading operating systems has decreased, according to data released today by Kantar Worldpanel ComTech.

Through the 3 month period ending May 2013, Android continues to lead smartphone sales at 52%. Close behind is iOS with 41.9% of sales. Windows remains in third with 4.6% of sales, up 0.9% versus the same period last year.

According to the report, the iPhone 5 was the best-selling smartphone at T-Mobile during the quarter, despite not having launched until the middle of the survey period. The iPhone's 31% share of T-Mobile smartphone sales was still well short of the device's 60% share of sales at AT&T and even its 44% share at Verizon, but with the device only having been available for half of the quarter, a more realistic measure of the iPhone's popularity among T-Mobile customers will come in future quarters.