iPhone panic rtunref: bad refcnt: NAND (rtunref: bad refcnt)
Panic codes: rtunref: bad refcnt
How to fix it
The panic points to the hard disk (NAND).
1. Check the hard disk (NAND) and its circuit.
2. Restore with iTunes / 3uTools. If the restore fails or the panic comes back, the NAND or its soldering is faulty.
By Hasan Patel, iPhone Fixer. Check your own panic