Safe way to jailbreak my iphone 3?

[katguinn]

I have an unlocked i-phone 3. I purchased a sim from straight talk and managed to unlock the phone using unlockit.co.nz. But the phone does not want to send pic messages and the 3g data internet does not work, I can only browse when using wifi. Is this because I need to jailbreak the phone, or is this another issue? Is thebigboss.org a good site to trust to help me jailbreak my phone?
Also, how do I find out which firmware vs I am using? Hep meh plz!

[orangekid]

To find out which firmware you're using go to:

Settings > general > about. You are probably on 3.1.3

I don't know how they unlocked your phone, but you need to make sure the correct APN settings are in for your network. Also, it sounds like you may have gotten a tmobile bands SIM and not an ATT one, can you confirm this?

We can go from there.

[jackbella]

You might have to actually downgrade your software version depending on what exactly version you have. Just download the program and it will then jailbreak. Take a look at the article of how to jailbreak iPhone running 6.1.1, which will tell you a safe way to jailbreak your iPhone 3.