For a few hours on July 8, a batch of old iPhones and iPads could not be restored. Apple pulled the baseband signatures for a set of legacy devices, and by early afternoon Apple put them back. Nothing was lost. What it exposed is worth keeping.
What happened
Apple didn’t stop signing the old iOS versions. It stopped signing the baseband firmware, the low-level code that runs the cellular modem, bundled with them. That distinction is the whole story. The system files stayed valid, but with no signed baseband, a restore through Finder or iTunes failed anyway.
The list spanned iOS 6 through 10: the CDMA iPhone 4, the 4S, the iPhone 5 and 5c, the original cellular iPad mini, the CDMA iPad 2, and a few more. Every affected device was a cellular model. Wi-Fi-only iPads were untouched, because they have no modem and no baseband to sign. That is the proof of what broke.
Who it hit
A device already running its firmware kept working. The wall only appeared on a fresh restore or a downgrade, which narrows the damage to a narrow group: repair shops, developers testing old apps, the jailbreak community, and collectors who keep this hardware alive. One quiet casualty was iOS 8.4.1, which Apple has kept signed for years as a stepping stone to iOS 9. For a few hours, that bridge was gone too.
Why it still matters
Apple gave no reason, and a reversal that fast reads as a glitch, not a decision. The likely cause, per the community, is a baseband security issue that set off an automated pull and reached too far. Either way, the system did exactly what it is built to do. A server stopped saying yes, and hardware people own outright became unrestorable.
That is the part to sit with. These phones are over a decade old and out of everyone’s upgrade plans, but the people who preserve them do real work: keeping old apps testable, old software runnable, a piece of the platform’s past from going dark. All of it runs on Apple’s permission. The signatures came back today. They didn’t have to.
