world first unique solution, dead phone recover by his own firmware only on volcano box Improbity

here is how can you do it
(only for spd 6531 phone)
first read info

i read flash file for future work and for backup
(you must also need phone own backup )

Then do format

after format same condition
but no tension bec
unique solution is starting now
(if phone is for codes or etc , then may be phone dead , no tension just go next setup )

now i write backup on this phone

after write flash file done ,
just do format

And volcano magic
phone power on working 100%

here is proof