Iphone 4 iOS 5.0.1 help

i have couple of questions ios 5.0.1 on iphone 4:
iphone 4 on 4.0.1 firmware 01.59.00 baseband, did jailbreak , unlock , never bothered upgrade newer versions of ios.
what's best way (if possible) 5.0.1 , keep jailbreak , unlock? i'm living in europe , unlock vital me.

thank you!

 

http://www.iclarified.com/entry/index.php?enid=18932

 

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