Try wiping the iPad clean and when you set it up don't use a password, I had this issue before.hey i have an ipad mini 1st gen on ios 9.3.5 and i used phoenix jailbreak and coolbooter to downgrade to ios 6.1.3 and when im going through the setup screen its ask for an alphabetic password and i dont know plz help
Also, if you want coolbooter IOS 6 as your main OS, use coolbooter untether.