If you’ve updated to iOS 27 and spotted an “Optimizing Search and Siri” message in Settings, there’s no need to stop using your iPhone or assume something has gone wrong. The message means iOS is rebuilding its search index, a process that becomes necessary after a major update because a major iOS update often implements a brand-new search infrastructure, and the system cannot simply update your existing index. It must crawl through your entire storage drive from scratch. Here’s what that means for your phone’s performance while it’s happening and how to help it finish faster.
You can download iOS 27 now by going to Settings > General > Software Update > Update Now and following the prompts on your screen.
At June’s Worldwide Developers Conference, Apple announced that it was rebuilding its Search interface for iOS 27. The company said the restructure would make searching across your device faster, more reliable and more accurate. In order to do that, iOS 27 has to reindex items across your iPhone. So after you update, you’ll see a banner in Settings that reads “Optimizing Search and Siri.” This is a normal part of the update, and it could take a while to finish, but the good news is you can still use your iPhone during this process.
Here’s what you need to know about the indexing and optimization process once you download iOS 27.
What is indexing?
Data indexing is the process of scanning and organizing metadata from data assets into an index so it can be easily searched.
“Think of it like the index of a book,” data management company Komprise wrote online. “[The index] doesn’t hold the content, but it tells you where to find it, and what’s inside.”
Apple’s support page about Spotlight indexing says that Spotlight search indexes your iPhone when you first set up your device, as data changes on your device and after you update your iPhone. So your device has reindexed before and you likely never noticed – I know I didn’t.
Apple also notes that your iPhone’s index “stays on your device and isn’t shared with Apple or your other devices.”
Indexing can take hours or days
Apple’s support page notes that indexing could take anywhere from a couple hours to a few days. When I updated my iPhone to a beta version of iOS 27, my iPhone took a couple hours to index, but the more stuff you have stored on your phone, the longer it will take.
The process takes longer this time around because Apple rebuilt its Search interface in iOS 27. So the update isn’t just adding a few more things to the index, it’s implementing a new search system.
That means the system isn’t just crawling through the new stuff — it needs to go back through all the data in your phone. Think of it like cataloging new items you’ve bought versus creating an inventory of everything in your home.
Apple does offer a few suggestions on how to speed up the process:
- Plug your device into a power source.
- Connect your device to Wi-Fi.
- Don’t use your iPhone.
OK, can I still use my iPhone?
You can! Indexing doesn’t prevent you from using your iPhone, but it goes faster if you set the phone aside.
If you do use your iPhone during the process, your Spotlight search results might be incomplete because it hasn’t finished indexing. Otherwise, your device should operate as usual. Which is good because I couldn’t imagine going without my phone for a few days at this point – don’t judge me.
Spotlight search still not working?
If your iPhone is finished indexing – the banner in Settings will go away – and you’re still running into issues, you should review your Search settings and make sure Spotlight has access to your apps. Here’s how to check.
- Tap Settings.
- Tap Search.
From here, you can adjust what shows up in Spotlight, and near the bottom of the menu, you can review which apps Spotlight has access to. You can tap into each app to grant or revoke Spotlight permission.
However, there doesn’t seem to be a way to grant or revoke Spotlight access across all apps at once, so you have to go into each individual app to do this.
For more on Apple, here’s what to know about the iPhone Duo and everything Apple announced at its “Surprise and shine” event.
