PwnageTool offers risky iPhone 3G, 3GS unlock

You can also use the "Dial" command to actually dial a number rather than working off of your contacts list, which also works nicely if you take the time to clearly state each individual number. Unfortunately, the Voice Control isn't very intelligent and if you mistakenly say "Call" followed by a string of numbers, Voice Control doesn't realize what you are trying to do and fails, saying "No Match Found." Oddly enough, if you say "Dial" followed by the name of one of your contacts, it does work, so there is a bit of inconsistency in the approach that leaves quite a bit of room for user error.
http://www.gizmos360.com/iphone-3gs.html

It sounds risky, but it's actually very easy using redsn0w. It pretty much walks you through the process.

I moved to another country 2 months ago, so I had a very expensive iPod touch and a cheap local phone with me all the time. Now I have my iPhone 3GS back! Definitely worth the risk!

If you're gonna try this be sure to visit the Dev Team website and read the comments before trying it on your specific phone.

Good luck!

After making a snarky comment about jailbreakers last week, I decided to jailbreak my old iPhone 3G just to see if much had changed since I did it to my original Touch three years ago.

After spending, collectively, about four hours trying to use the various software tools and downloading old firmware images and whatnot, I finally just pointed the phone at jailbreakme.com and let it have at it.

So, what I got for my efforts, from what I can tell, is a software store that sells tweaks and apps that let you customize your phone. And that's nice and all. I can imagine finally having a battery percentage marker on my Touch, just like the one on my iPhone and iPad, which are all running the same version of iOS.

But, do you have to do this EVERY time a new version of the iOS comes out? Do you have to wait until someone hacks the new version before you can upgrade? So, all of you who jailbeak your phones...you're still waiting to upgrade to 4.2.1? What a pain in the ass. I'm not knocking you...it's your device, so do with it what you will. And some of the tweaks are no-brainer shoulda-beens (see note about battery percentage). But...MAN! If some people are this passionate about making their off-the-shelf phone behave exactly as THEY think it should, are they adding Evinrude motors to their blenders at home, too?

Anyway...it was an interesting experiment. But, for this everyday "weekend warrior", juice wasn't worth the squeeze.