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Mobile Minutes: Google’s Who’s Down?; T-Mobile’s iPhone win; Private tech investment; Apple’s indoor mapping app

Who’s Down? No, it’s not an app designed to see whose inner Sadness—thinkInside Out—is smashing the main buttons a bit too hard on their mind’s control console. It is an app, but it’s a new Google experiment designed to help people figure out which of their friends don’t have anything to do at a particular moment (but would like to go do something).
Read more on PC Magazine

Apple financing seen a boon for cheaper carriers like T-Mobile
Apple Inc.’s entry into iPhone financing is starting to dislodge some customers from the biggest carriers and sending them shopping for cheaper, smaller providers like T-Mobile US Inc.
Read more on Bloomberg

As private valuations increase, returns shrink, study finds
Late-stage investors in private tech companies are seeing smaller returns, and a new survey suggests that professionals expect the trend to continue.
Read more on The Wall Street Journal

Apple’s secret app maps indoor locations using iPhone sensors
A secret Apple iOS app has been discovered on the App Store. “Indoor Survey” does not appear through a traditional search, but the app can be accessed through a direct link. First spotted by developer Steve Troughton-Smith, the app uses signal data and the iPhone’s sensors to map out indoor venues and enable indoor positioning.
Read more on International Business Times