How to Customize Lock Screen Shortcuts on the OnePlus 3 and OnePlus 3T I have installed a new camera app that I'd like to use by default. I set it as the default app in the settings, but that didn't make it the target app for the lock screen shortcut or the O gesture.
The most simple method - and I've tried this on my own OnePlus 3 running OxygenOS Open Beta 21 - is to simply disable the stock camera app - known as "OnePlus Camera" on OnePlus devices.

To disable it, go to Settings &gt; Apps &gt; OnePlus Camera &gt; Disable

That should do the trick.