Virgin 3gs old bootrom 3.1.3.. can i get to 4.1 untethered/unlock?

[sharkracer21]

Hi I just purchased a 3.1.3 virgin 3gs {no shsh on file} on the old bootrom {iDetector confirmed}.

I tried using the search and keep coming up with different info..

What are my options? I need the phone unlocked with an untethered jailbreak. I dont wanna go the ipad baseband route.

Is it possible to just update to 4.0.1 or 4.1 and enjoy life with a functional battery and reliable jb? I dont really see a point to 4.2.1.

thanks

[i.Annie]

Check for SHSHs. Use TinyUmbrella. If you have SHSHs for 4.1, it can be done with a custom firmware via PwnageTool. If you don't have a SHSHs you can go to 4.2.1 too with a custom firmware to preserve your baseband and keep the unlock. It will be untethered since you have an old boot.

Edit: 4.2.1 will be fine for your device and shouldn't present much problems, but if you have SHSHs you can go to 4.1 if you want. If you don't have SHSHs, you can stay on 3.1.3 if you're worried about issues on 4.2.1, but being the old boot 3GS I don't think it'll be an issue.

To get to 4.2.1, with the old boot there are a couple special instructions so check out the dev team's blog for those.

[sharkracer21]

Thanks I'll check their site for the instructions..

I was reading that their is a battery related issue going that route, but I guess I have no choice.

Their are no shsh on file. I wanted to bring it To 4.0+ or so since some
Apps require it at this point.

[i.Annie]

Then 4.2.1 via custom firmware (PwnageTool created) is your only option if you need to maintain unlockability.

Basically to sum it up you'll be restoring to a cfw without the iPad baseband. That'll take you to 4.2.1, then you'll need redsn0w 0.9.6rc8 to complete the jb and install Cydia