Convert and Unlock Nokia 1600b Rh-65 to 1600 Rh-64

full erase n flash fon with 1600 rh-64 firmware....
write good rh-64 pm...
unlock....

now change two filters just above netwrk ic from any 3100/1600/1110......

enjoy

or here.....
convert 1600b to 1600 !
1.earse flash with hwk
2.now full flashing phone
3.write full pm_good rh-64 pm...
4.unlock phone
5.change 4 -filters [all] from 1600-2310-6030