Just recently, Luca Todesco posted a source
code
 at GitHub for iOS 10.2 jailbreak using Yalu and Cydia Impactor but it’s currently being
described as incomplete. But Luca Todesco and Marco Grassi has released a
jailbreak for iOS 10.2 Yalu jailbreak with a working mobile substrate.

Follow the same steps on how to jailbreak iPhone on iOS 10.2 using Yalu and Cydia Impactor. With the iOS 10.2 Yalu jailbreak, all tweaks may not compatible and might not work perfectly.

With iOS 10.2 Yalu jailbreak release it currently supports 64 bit iOS devices like iPhone 6s, iPhone
6s Plus, iPhone SE and the iPad Pro. The iOS 10.2 jailbreak is not compatible
with iPhone 7 and iPhone 7 Plus but it will likely to support for additional
devices in the future.

To jailbreak iOS 10.2 using Yalu and Cydia Impactor, the process of jailbreaking is same as previous iOS
10.1.1 jailbreak. You need to download beta 7 Yalu .ipa file and Cydia Impactor from our download page and follow the same steps on how to jailbreak iPhone on iOS 10.2 using Yalu and Cydia Impactor

With the iOS 10.2 Yalu jailbreak, all tweaks may not compatible and might not work
perfectly. So stay updated until it gets support for iOS 10.2 jailbreak.