Apple iOS 18.3 is compatible with all iPhones that can run iOS 18. This means all iPhones from the iPhone XS onwards, including the second- and third-generation iPhone SE models.

Apple released iOS 18.3 on Jan. 27, more than a month after the company released iOS 18.2. While that update introduced more Apple Intelligence features to some iPhones, like Genmoji and Image Playground,

Apple has officially released iOS 18.3, a major update that introduces new features, resolves bugs and addresses security concerns. The update, which became available on Jan. 27, can be installed on iPhones starting with the XS model and newer,