Most users today use CoolBooter . This method allows you to keep your main iOS version (e.g., iOS 9.3.5) while installing a secondary "verified" instance of iOS 6 that you can boot into at any time. Step 1: Jailbreak Your iPad Mini
: You jailbreak your current iOS and use the CoolBooter app to install iOS 6. downgrade ipad mini to ios 6 verified
to iOS 6 is a popular "helpful feature" for enthusiasts because iOS 6 is often considered the most stable and nostalgic operating system for that specific hardware. The Holy Grail: How to Downgrade an iPad
Apple stopped signing iOS 6 for the iPad mini (model A1432) years ago. “Signing” is Apple’s digital bouncer: your iPad, during a restore, phones home to Apple’s servers to ask, “Is this version still allowed?” If Apple says no (and it does, since 2013), the restore fails. to iOS 6 is a popular "helpful feature"
Thousands of users have successfully downgraded iPad Mini (1st gen) to iOS 6.1.3 (build 10B329) using the "kDFU" method.