Apple Stops Signing iOS 18.2.1, Preventing Downgrading
Apple today stopped signing iOS 18.2.1, which means that iPhone users who have upgraded to iOS 18.3 can no longer downgrade to the prior version of iOS 18. Apple released iOS 18.3 a week ago.
When new versions of iOS are released, Apple stops signing the prior version after a week or two. An update that is not signed is not able to be installed on an iPhone because there is a server-side software verification check. As of right now, iPhone models compatible with iOS 18 are only eligible to download and run iOS 18.3.
By preventing customers from downgrading to older versions of iOS, Apple ensures that devices are kept up to date with the newest security improvements.
Apple's iOS 18.3 update included a handful of Apple Intelligence updates and more than 20 security updates. One of those fixes addressed a vulnerability that may have been actively exploited on some devices, demonstrating why it is important to keep iOS software up to date.
Popular Stories
Apple has added a new "iPhone Handoff" feature to iOS 27 that will allow you to switch between two iPhones while using the same phone number on each device.
This functionality was briefly mentioned during the WWDC 2026 keynote in June, on a slide that listed hundreds of new features coming in iOS 27 and corresponding software updates, but Apple never shared any further details at the time.
...
Less than a week before Apple debuts new iPhone 18 Pro models, research firm TrendForce has estimated the prices of the devices based on the latest hardware cost environment.
TrendForce's price estimates compared to last year's models look like this:
Model
Starting Price
Model
Starting Price
Change
iPhone 17 Pro
$1,099
iPhone 18 Pro
$...
Ahead of Apple's event on Wednesday, September 9, where it is expected to unveil its first-ever foldable iPhone, Taiwanese research firm TrendForce today outlined the device's estimated price range, features, and some other key details.
In the U.S., TrendForce estimated that the foldable iPhone will have a starting price of $2,099 to $2,299 and said the highest-end configurations could...
