<p>Earlier today, Apple released the fourth beta of iOS 7.1 to developers, which included both bug fixes and a few new changes to the operating system. While iOS 7.1 beta 3 introduced several visual changes, iOS 7.1 beta 4 focused more heavily on behind-the-scenes improvements. There were, however, a few tweaks to further streamline the look of iOS 7, which are detailed below.</p><p>Slide to Unlock/Power Off: Most notably, the Slide to Unlock bar at the bottom of the phone is now more prominent, with a brighter, slower animation. The same brighter animation can be seen in the Slide to Power off bar when turning off the phone.Revamped Slide to Unlock/Slide to Power off animation (Courtesy of @Elias96)Contacts in Dialer: The option to add a contact when entering a phone number has been altered slightly and is now executed by tapping the + sign next to the phone number. Previously, there was a line that said "Add to Contacts."</p><p>Old version on left, iOS 7.1 beta 4 on right. (Image courtesy of iDownloadBlog)Messages Scrolling: When scrolling through the Messages app in beta 4, it seems there is slightly more "bounce." This is in line with previous changes to Control Center, which introduced a bounce animation.</p><p>Siri: In the U.K., there is a new Siri voice on the iPad.</p><p><a href="http://www.macrumors.com/2014/01/20/ios71-beta4-tidbits/">Keep reading...</a></p><p>Read also:</p><p><a href="http://appleinsider.com/articles/14/01/20/apple-provides-ios-71-beta-4-to-developers">Apple provides iOS 7.1 beta 4 to developers</a> (Apple Insider)</p><p><a href="http://bgr.com/2014/01/20/ios-7-1-beta-4-download-released/">iOS 7.1 beta 4 has been released</a> (BGR)</p><p><a href="http://www.gottabemobile.com/2014/01/20/ios-7-1-update-details-emerge/">5 New iOS 7.1 Update Details Emerge</a> (Gotta Be Mobile)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=djKHctCZM3Y2rVMFexy_sWXuukY7M&authuser=0&ned=us">56 additional articles.</a></p>