hello i have a problem. I am using b-box for the first time. I accidentally deleted all my syscfg data on my ipad 7. Then I entered the default data and my original serial number, but I get an error that the ipad cannot be activated. itunes connects to the device but says unidentified device and says install ios again. When I install ios, it says insert sim card, but my device is a2197 only wifi. how can i solve the problem. thanks. In addition, the screen of the iPad 7, which is normally orange in engineering mode, now turns purple and after 1-2 minutes it exits this mode and opens normally.