Apple has released iOS 10.3 beta 6 to developers for testing. The build number is 14E5273a. iOS 10.3 brings numerous changes including support for Find My AirPods, a new Apple File System, Reduce Motion in Safari, a Podcasts widget, CarPlay improvements, a new way for developers to ask customers to provide App Store ratings and reviews, the ability to Share iCloud Analytics, and more.

What iDevices could be upgraded to iOS10.3 beta6?

iPhone 7, iPhone7 Plus, iPhone 5, iPhone 5c, iPhone 5s, iPhone SE, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus; iPad4, iPad Air, iPad Air 2, iPad Pro (9.7/12.9), iPad mini 2, iPad mini 3, iPad mini 4; iPod Touch 6. 

Step1: Download and install the latest 3uTools on your PC. Connect your iPhone to PC using the USB cable. After it’s connected, please click ”Flash Jailbreak”→click “Easy flash”. 

Step2: As shown in the following figure, please select the firmware 10.3 beta6, select the option “Retain User’s Data While Flashing” and click “Flash ”. (If you have downloaded the firmware, you need to import it to your PC first, and then flash your iPhone).

Step3: Keep a good connection between iDevice and PC, and then just wait until this process is finished.