This is the second day since many of you started receiving your OnePlus 5 devices from the early sale. Just over the weekend, the phone received an update to OxygenOS 4.5.2 offering a number of stability fixes and optimizations. Today, another OTA update is being pushed to the OnePlus 5, though it's not the promised stabilization for 4K recording. The new OTA update bumps OxygenOS to 4.5.3 and offers bug fixed for dropped Wi-Fi signal, a Google Translate hiccup, and a fix for the Expanded screenshot feature. In addition, tweaks and optimizations have been made to the System, Camera app...
Source: http://www.gsmarena.com/oneplus_5_receives_second_ota_update-news-25859.php