HOW TO FIX
Simply boot into TWRP and enter your PIN (if you've set one) to decrypt the stroage. If you don't have TWRP (for whatever reason) you can do so via ADB too but ONLY if you've connected your phone to your PC ...
Sorry should have googled it:
Firstly you need to boot into TWRP and then follow these steps:
Go to Advanced > File Manager > data > system.
And then delete locksettings.db, gatekeeper.password.key and gatekeeper.pattern.key....
Nope I'm too lazy. But there is a search function in this forum and Google will help.
Unfortunately, your device(Israel, (ISRAEL) )does not support unlocking the bootloader.
I've e-mailed the people from Oukitel.
Hope they are so kind to provide us with a working root-method with cellular functions AND an update to Android Oreo....
Somebody already received it? I ordered at banggood.com and it says it's shipped on 2017-10-03. When can I expect to my K3 to arrive? Will it be send from China?