As the EDL firehose been public now we can unlock Z80 Ultra or just root it without actual unlockHere is the guide:Firstly, download the tool at link below:en:ZTEToolBox1.2.2-beta1.zipdrive.google.comzh:中兴家族工具箱1.2.2-beta1.7zdrive.google.comThen extract it, get files and click ZTEToolBox.batIt would acquire UAC permission allow itIf first launch, input B and enter to select device modelinput...Read more