![iPhone 3GS Still Outsells Everything But the iPhone 4 [STUDY]](https://helios-i.mashable.com/imagery/archives/053XkA9m5GWwytLWYeJSlVs/hero-image.fill.size_1248x702.v1647020185.jpg)
Apple's iPhone 4 took the number one spot, followed by the iPhone 3GS in the second quarter, according to The NPD Group. The latter model, which is slower and has less functionality than the iPhone 4, is also much cheaper. AT&T cut the price of the 3GS model to $49 with a two-year contract, in January. Refurbs of that model can go for as low as $9. Best Buy offered the phone for free with contract Monday.
A new 16 GB iPhone, meanwhile, costs $200 with a two-year contract and the 32 GB version sells for $300. Verizon, which began selling the iPhone 4 in February, doesn't offer the 3GS iPhone as an option.
Even though the iPhone held the top two slots for mobile phone sales, Google's Android operating system was on 52% of all units sold compared to 29% for Apple's iOS. RIM's BlackBerry was number three with 11%. Motorola's market share fell from 12% in Q2 2010 to 9% in the current quarter, according to NPD. The report also noted the growth of prepaid plans offering smartphones.