I have a OTB 1.02, which is unlocked and jailbreaked on 1.12 with AT&T. I want to upgrade to 1.13, but I want to know all the necessary steps involved so I don't mess up my iphone. Things like which steps to do first such as doing the soft upgrade, and than upgrading the baseband,youtube fixes, etc. I've looked around and I'm not exactly sure so anyone who could direct me, I'd appreciate. I've installed BSD subsystems 2.0 already, but there's a 2.1 upgrade available, should I go for that or upgrade it after I hit 1.13.

regards