Apple today started rolling out the iOS 15.2.1 and iPadOS 15.2.1 update for all compatible iPhones and iPads. This is a relatively minor update from Apple aimed at fixing some underlying bugs with CarPlay and iMessage.
Apple’s release notes for iOS 15.2.1 highlights the following changes:Messages may not load photos sent using an iCloud Link Third-party CarPlay apps may not respond to input
You can install the iOS 15.2.1 update on your iPhone or iPad by navigating to Settings -> General -> Software Update. The update weighs around 700-970MB depending on your iPhone or iPad model. For a bug fixing update, this is surely a hefty download.