Από το blog του Zibri:
“ZiPhone v2.0 is finally OUT.
In the command line version, you will find a new option “-b” be very careful with that!
I take no responsability if you brick your iPhone!
ZiPhone -b will downgrade bootloader from 4.6 to 3.9, flash 4.03.13_G baseband version and unlock it (in one shot!).”
>> Download ZiPhone v2.0 <<