OnePlus has released OxygenOS Open Beta 2 for the OnePlus 5T based on Android Oreo that comes with a whole host of improvements and some new features. The most notable addition is a new OnePlus Switch app designed to make it easy to switch to a new OnePlus device from an existing one from any Android brand. Another addition is a new clipboard feature that's activated whenever you mark and copy something across the device. The phone will then let you search, translate or share that text. In terms of improvements, there are some to the battery for managing high power consumption...
Source: https://www.gsmarena.com/latest_oneplus_5t_open_beta_2_adds_new_oneplus_switch_app_for_switching_between_devices-news-29188.php