I need some information about the Jailbreak ( Iphone 4 - 4.3.3 )

i got downloaded anything and ready to jailbreak, but befrore i have some questions:

1. Will Apple note that when my Iphone were jailbroken and i used factory settings to return?
2. Will anyone note that unless i don't give it away to any provider - shop/ apple? ( don't know...maybe they can check it via Internet or so.... im new to Apple and Iphone? )
3. Using Factory Settings really will delete any ruts of the Jailbreak?
4. Is it really worth it?

Regards

e: living in germany and my provider is o2 if u need to know it..

This post was edited by Antifact on Jun 27 2011 03:34am

1. If you want to return your iPhone, you need a unmodified firmware. A complete restore is enough.

2. Unless you bring it to a store, nobody will notice the Jailbreak.

3. Yes

4. That's your decision.

every word is right one )

ok...thx i hope thats true ^^
going to jailbreak right now

No, it won't. If you decide to save your SHSH blobs on cydia, it will remain forever. A full restore does not erase these information.