Apple has released a new rapid security update to iPhones running on iOS 16. The latest software patch is said to be a rapid security response, which is issued when the company finds a major bug or security loophole that requires a quick fix to prevent vulnerability. For an iPhone running on iOS 16.4.1, the iOS 16.4.1 (a) rapid security update is just around 90 MB, and hence, it does not introduce any new features. Instead, it fixes a major security issue that makes iPhones more secure. Even if you are on an earlier version of iOS, it is recommended to install this patch to further improve the security of your iPhone. For an iPhone running on iOS 16.4.1, the iOS 16.4.1 (a) rapid security update is just around 90 MB, and hence, it does not introduce any new features. Instead, it fixes a major security issue that makes iPhones more secure. Even if you are on an earlier version of iOS, it is recommended to install this patch to further improve the security of your iPhone.