2.0 to 2.1 firmware upgrade

[bergman]

Will upgrading from firmware 2.0x to 2.1 require me to re-jailbreak my iPhone? Are there any significant improvements in 2.1? I just received the iPhone 1st gen yesterday so I'm working on getting contacts, etc. properly synched.
Thanks,

 

[Jeremy]

Yes it will. It's a simply process though. Check for my guides in the sticky on the top of this forum.