step for repair
-Put Dfu mode to purple
-Read All info than Save
-Go to low parameter
-backup device underlying Data
-clear all the underlying Data
-flash with standart underlying Data
-Tick all Parameter Sn wifi etc
iPad A1567 iCloud Remove Done
Converted GSM to WIFI
Step1. Make a jumper on the resistor and make your iPad wifi only
Step2. Reprogram SN, WIFI, BT using iFree Box.
Step3. Change your iPad A1567 wifi ic from iPad A1566 (339s0251) Wifi ic must be grey color black won't work.
Caution. * do not use heat above 280 degree or your ic won't work
Step4. Restore your iPad with 3utools or iTunes.
Boom iCloud remove done