How to upgrade my iphone 4 without losing jailbreak?

I have iphone 4 witch is ios 4.2.1 and i want to make it to 5.1.1
what is the easiest way to upgrade it without losing jailbreak and jailbreak downloads?
thank you!

Added (1). I don't really know about these things…
so please just lead me to the sites and w/e
and thank you again

Added (2). I don't really know about these things…
so please just lead me to the sites and w/e
and thank you again

It requires a restore when you upgrade, so you'd have to lose it and put it all back on. I had to do the same thing when I upgraded to 5.1.1 and it was a pain, but the upgrade was worth it.

Not possible. You will have to loose the jailbreak & redo the process to get it once you are on 5.1.1.

It is not possible.

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