Apple is about to issue iOS 17.6.2, a surprise new iPhone update launching before iOS 18 next month. News of iOS 17.6.2’s arrival comes via a report on Apple-focused site 9to5Mac, which cites a reliable leaker who has a private Twitter account.

The 17.6.2 upgrade will come with build numbers 21G101 and/or 21G102, 9to5Mac reports.

It won’t contain new features, so what could be in the iOS 17.6.2 update and when can you expect it?

Apple’s iOS 17.6.2 probably contains security fixes for holes in the iPhone operating system. If this is the case, the timing of iOS 17.6.2’s release makes sense—weeks before iOS 18, a major point update.

This is because many iPhone users will wait to update to iOS 18, preferring to watch for any bugs to be ironed out first. At the same time, Apple ‘s AI features in Apple Intelligence won’t be arriving until iOS 18.1 in October, which also lowers the incentive to upgrade to iOS 18.

It’s worth noting, however, that iOS 18 will also come with security fixes and will be the more secure operating system when it is launched in September. Once iOS 18 has arrived, Apple will keep it updated with a much wider range of security fixes, while iOS 17 will receive only important patches.