https://wccftech.com/oneplus-7t-day-one-update-brings-camera-improvements-and-more/

Day one software patches shouldn’t ideally be a thing, but they’re becoming exceedingly commonplace with recent flagship released. Even the Galaxy S10 and Note 10 were at the receiving end of those when they dropped and today; the OnePlus 7T just got its, merely minutes after its announcement and release. The software build weighs in at a 110 MB which is a good indicator that it brings nothing in the way of new features and is just some last-minute cleaning by OnePlus. Here’s the changelog, according to one user who managed to install it.

The changelog is very generic and doesn’t tell us much about what each change brings. The verbatim merely states that the build includes improved system stability, camera, and display performance. We’re not entirely sure what the ‘other issues’ are, but launch-day devices are often imperfect and almost always have a few kinks that need to be ironed out.