Update firmware for 3650

Hi

I wonna know what do i need to upgrade my nokia 3650 firmware.
Also if i want to install a new O/S instead of a corrupted one what do i need to do so besides the Data Cable , what sofware do i need. I''ve seen lots of dtc4 flashers but can they be used to install Symbian 6.1 .
Thanks for your time

We use Griffin Gold to flash this model.They comes with cables software & instruction.Go read the old posts from the end of this topic,you will gains a lot of knowledges from NokiaFREE.org