I fixed My SM-N9005 using SPT box and i have 2G/GSM working again
it has been unlocked using super imei with the SPT Box to work outside Europe
unfortunately there was a bug in the 2G/GSM network
they fixed it now ..
so all you have to do is find any mobile repair shop near you that has the SPT Box
connect your N9005 to the Box using USB in ( dm+modem+adb ) mode by dialing *#0808# in Samsung's Dialer ..
Choose N900w8 from the list then click Repair 3G Network ( this will Fix the 2G network )
then choose N9005 again and press repair 3G network again ( this will reFix the 3G network with 2G working too )
this will not restore the original IMEI - S/N but the phone will be fully functioning