Simple Solution needed for a 3g Jailbreak/unlock

[oldgit49]

I know I know! you guys must bget sooo bored of this question but I have spent 2 hours trawling this site and others for a simple answer.
I have a 3g with os 3.1.3 and fw 05.12.05 it's an old phone I want to give my son as his first. What do you suggest as the untethered jailbreak and do I need to downgrade or upgrade and how? and I guess unlock will be simple after that.
The new absinthe does not seem to do 3g as far as I can tell anyone know about spirit or whitedoor? Your help is much appreciated I used to like the phones where you put your finger in the hole and pushed it round!

 

[falterego]

Looks like this article might help you.

Taken from Lifehacker's Always Up-to-Date Guide

 

[surfkw]

Official Unlock

As an owner of an old iPhone 3G that I recently gave to my wife I recommend just having AT&T do an official unlock for you. I had mine jailbroken and unlocked for a couple years while overseas but recently AT&T will unlock the phone for you. My wife uses it happily on T-mobile.

http://osxdaily.com/2012/04/09/unlock-iphone-att/