The most recent iOS 8.3 beta was seeded to developers on March 12, but even though its been in the hands of testers for over a week, people are still discovering hidden features



From MacRumors:

Over the weekend, two new iOS 8.3 features were found, including an update to Siri and an update to app purchase settings. With the iOS 8.3 beta 3 installed, users can now ask Siri to make phone calls using the iPhone's speaker. If you ask Siri to "Call [name] on speaker," the call will be made via speakerphone, enhancing Siri's hands-free capabilities. If you make the same request in iOS 8.2, Siri ignores the "on speaker" part and places the call as normal.

  New iOS 8.3 Features: Speaker Calls With Siri, No Password Required to Download Free Apps