Apple has just released iOS 11.0.2 to the public. It can be downloaded now for your iPhone or iPad over-the-air or through iTunes.
Here are the release notes:
– Fixes an issue where crackling sounds may occur during calls for a small number of iPhone 8 and 8 Plus devices
– Addresses an issue that could cause some photos to become hidden
– Fixes an issue where attachments in S/MIME encrypted emails would not open
Apple is also currently beta testing iOS 11.1 with both registered developers and members of the public program. The first version of that software was released last week.