If I Jailbreak On 4.2.1

[iPhoneGleek]

w/ iPhone 4 will i lose all my songs contacts, etc ?

 

[sduck]

no. .

 

[iPhoneGleek]

I wasn't sure if it was like a restore.

 

[Ipheuria]

This doesn't mean you shouldn't do a sync and backup before you start though. Once when I was JBing a friend's iPhone I got an error during the JB process for the first time ever and I had to restore the phone before the JB worked the second time. Luckily I told him to sync and backup before I started. You can never tell what will actually happen, it's nice that in theory everything should go smoothely but that wont help you if in practice yours doesn't.

 

[Alli]

http://forum.tipb.com/jailbreak-unl...-jailbreak-faq-updated-ios-4-1-11-8-10-a.html

 

[jdavis530]

This doesn't mean you shouldn't do a sync and backup before you start though. Once when I was JBing a friend's iPhone I got an error during the JB process for the first time ever and I had to restore the phone before the JB worked the second time. Luckily I told him to sync and backup before I started. You can never tell what will actually happen, it's nice that in theory everything should go smoothely but that wont help you if in practice yours doesn't.

Couldn't agree with you more. Transferring purchases and backing up is a must, because you never really know what might happen.