Someone can help me. I had flashed on my N9 the software
V 40.2012.21-3_PR_005.
For going to my provider Telcel to unlock my phone i flashed back with the original FW for the Productcode via Nokia Suite (reinstall FW).
It is now
V 40.2012.21-3.420.4_PR_420
The bad think is that my provider Telcel refuse to unlock the phone and even more bad, i have now a crapy FW, Doble Tip to unlock doesnt work (yes its activate in the menu) yesterday it was blocking. Restart wasnt posible. Reflash was the only solution.
Reflash back to V 40.2012.21-3_PR_005 isnt posible (you know its like an disallowed downgrade)
So how can i reflash a good working FW?

In the center of the town some guys offer me to unlock with a flasherbox.
Is it also posible to downgrade the N9 with a flasherbox?

Thanks in advance