Apple just shipped iOS 18.3 last week, but it seems that another software release is on its way soon. Internal 9to5Mac visitor logs show that Apple is currently testing an iOS 18.3.1 update. Heres what that means.Apples next iPhone update expected to focus on improved performanceiOS 18.3 launched early last week with several updates to Apple Intelligence features, including:changes to the way notification summaries are displayedthe disabling entirely of summaries for certain app categoriesvisual intelligence upgrades, including one addition for Apple Calendarand it enabled Apple Intelligence by default on all compatible iPhonesFinally, the update also brought a welcome Calculator app fix.Currently, beta testers are still waiting for the first iOS 18.4 beta to arrive. That update is expected to pack a lot more Apple Intelligence goodiesincluding major Siri upgrades.But perhaps before that first beta debuts, were going to get a public iOS 18.3.1 launch.While we dont currently know what changes iOS 18.3.1 might introduce, or when exactly it will launch, it will most likely focus primarily on bug fixes and performance improvements.Apple similarly shipped iOS 18.2.1 early last month as a bug fix update.For reference, that 18.2.1 release contained the following description: This update provides important bug fixes and is recommended for all users.Expect to see something similar from iOS 18.3.1 when it arrives as your next iPhone update.Have you had any major bug issues in iOS 18.3 that you hope are fixed in iOS 18.3.1? Let us know in the comments.Best iPhone accessoriesAdd 9to5Mac to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Mac experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel