4.2 jailbreak?

[kwikfix]

just used jailbreakme on the wifes 3GS, shhhh

I also have an i4 with 4.2.1 that I want to jb, can I use her shsh or firmware that tiny umbrella and/or Cydia stores to downgrade my i4 to her 4.0.2?

[BumbleBeez]

just used jailbreakme on the wifes 3GS, shhhh

I also have an i4 with 4.2.1 that I want to jb, can I use her shsh or firmware that tiny umbrella and/or Cydia stores to downgrade my i4 to her 4.0.2?

No, SHSH are device specific.

[bmarkoff]

re-jailbreak question. currently have iphone 4, v.4.0.1 Jailbroken used jailbreakme. fw-01.59.00
when the new untethered JB comes out, what are the steps I need to take to upgrade and re-jailbreak. will I have to restore, and re-install all my cydia apps? if someone could give detailed instructions, it would be most appreciated.
thank you

[kwikfix]

thanks beez, I'll hold off till the jailbreakme is here for iphone4, was simple to setup

[onlinegamesnz]

I have another question. When i upgrade to 4.2.1 how can i import all my packages in cydia? I curently use pkg backup and backup regulary but i have never had to restore with it so i dont know if it work? Any ideas?

Cheers