While OnePlus has turned most of its focus to the OnePlus 5, it’s good to know they’re at least addressing some issues with the previous generation OnePlus 3 and 3T. The Oxygen OS 4.1.7 brings with it bug fixes and security patches for the two devices. One of the issues it’s fixed is one with the App Locker, which is meant to keep certain apps behind a PIN or password. They have fixed an exploit that bypasses the App Locker. The device doesn’t require Google Hangouts to be installed now either. On the security side, the patch is now updated to August 2017, bringing it up from the May 2017 patch. Other changes coming to the update include unspecified battery optimization as well as a quicker user experience with it. If you use either devices, keep your eyes peeled for the update, it should do you better.
Source: Android Central