OnePlus has released the fourth developer preview of Android Q for last year's and this year's smartphones - the OnePlus 6, 6T, 7, and 7 Pro. The changelog of this developer preview doesn't reveal much about what's new and vaguely says that it comes with "system functions improvement". However, it does list the known issues which you can check out in the screenshot below: Changelog of Android Q Developer Preview 4 for OnePlus 6, 6T, 7, 7 Pro OnePlus hasn't made any official announcement about the fourth developer preview at the time of writing, but users on the company's official...