Interestingly, the OnePlus 5 and 5T are the first devices from the company's portfolio to get August security patch. The OnePlus 6 received a big update a week ago but it didn't apply Google's latest security fixes.
However, both OTA updates have something in common - the PIN unlock method. Now the OP5/5T and the OP6 can be unlocked via PIN input without having to tap on the checkmark for confirmation. The new option can be found in Settings > Security & lock screen > Screen lock > PIN.
As usual, the update will gradually rollout to all users and the OTA software isn't region specific so VPN downloads won't work.
This updated gets PARTIAL project treble support. It was available for a long while in the Beta, so its now rolled out to regular users/stable version. So it probably won't support OS push-updates, but it could if OnePlus wanted to. The differ...
I have installed in op5 link : https://otafsg.h2os.com/patch/amazone2/GLO/OnePlus5Oxygen/OnePlus5Oxygen_23.J.38_GLO_038_1808082017/OnePlus5Oxygen_23_OTA_038_all_1808082017_ebb1d69f37.zip