Closure of the signing window comes shortly after a jailbreak of iOS 10.2 was released by Luca Todesco. Hopefully, you managed to jailbreak already or save your SHSH blobs as we recommended.
Currently, Apple's latest firmware is iOS 10.2.1 and developers have been seeded with iOS 10.3. If you accidentally update or restore, you'll find yourself on iOS 10.2.1.
Hopefully, saved iOS 10.2 SHSH blobs will help facilitate a downgrade to that firmware version for users who have performed a software update. Stay tuned for more details on that.
It could be quite some time before another jailbreak surfaces as Apple is switching to the APFS file system with iOS 10.3 which is likely to introduce new challenges.
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