Fortunately, thanks to the hacker Luca Todesco, you can still jailbreak your iDevice running iOS 10-10.2 using his Yalu Jailbreak tool. Although, you have to remember that this jailbreak is semi-tethered and still in beta stages, therefore you will be required to redo the process every seven days or once you reboot your iOS device.
Last but not least, if you have already saved your iOS 10.2 SHSH blobs and have accidentally updated to iOS 10.2.1, you can easily downgrade to iOS 10.2
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