A hack of Experian, the company that handles credit checks for the wireless carrier, results in the loss of T-Mobile customers' Social Security numbers, birth dates and names.
The total exceeds the 10 million sold in the opening weekend last year for the previous versions of Apple's smartphone.
The Korean electronics maker hopes the big V10 marks the start of a family of smartphones, akin to its G line.
The computer software makes common actions easier, such as letting users view two open windows at once with a split-view screen.
Despite warnings from Apple, users continue to alter their iPhones to be more flexible.
Device maker offers a glimpse of its first smartphone to run on Google's Android software.
Company reports that its smartphone division also had some trouble in the second quarter as unit shipments fell 3 percent year over year.
Also coming soon: Skylake, the code name for Intel's sixth-generation Core processor aimed at PCs, is slated to drop during the second half of 2015.
The smartphone giant expects second-quarter operating profit to decline 4 percent and miss analysts' expectations.
Thanks to Apple's new iPhones, the next wave of super-high-def video won't flow from Hollywood or pro sports leagues. It will bubble up from people like you.