This is a tutorial on how to bypass iCloud on iPad Mini 2 4G, after following this guide your iPad cellular shouldn’t work but wifi, bluethoot and gps will remain working.
First thing is to disassemble your locked iPad Mini 2 since this is a hardware method.
Video made by Powerbook Medic
Disconnect the battery and take out the motherboard.
On the iPad Mini 2 4G Model A1490 you must remove the resistors 1 & 2, then solder the resistor 2 to the position 3.
Connect your iPad to itunes
iPad will automatically enter in DFU mode.
You must restore your iPad Mini using iPad Mini wifi model firmware and follow the steps to activate it.
When successfully done, turn off the automatic firmware update.
As mentioned before this instructions are only for iPad Mini 2 4G model A1490 .