iPad rMini 32 on T-mobile:
- While boot looping, hold Power+Home until the iPad shuts off
- While off, plug in Apple-compatible headphones that have vol +/- and 'clicker' (like OEM)
- Press and hold the clicker button, then press power to turn on iPad, continuing to hold clicker
My iPad showed the completion of the evasi0n install, and now seems to be working fine.