Activate old 3g on At&t

[orijonl]

I have an old 3G on 4.2.1 and an active AT&T sim card with data plan from another phone. I cannot figure out how to activate the sim in the iPhone. iTunes wants to restore the phone when connected. It is jailbroken with the latest redsnow.

Any help is appreciated.

[iPittsburgh]

Put the sim card in the iPhone. Are you at the emergency call screen or recovery mode?

[orijonl]

The phone is working. It is jailbroken and I have access to the app store and cydia, but I can't make calls. it just keeps telling me the call failed. Also when I plug it in, iTunes wants to restore it.

[iPittsburgh]

If you're already at the home screen, you should just be able to insert the sim card and receive service. Are you getting any signal?

[orijonl]

its showing one bar, which is odd, because we have an AT&T microcell here in the next room.

[iPittsburgh]

Does the phone line have access granted to the microcell?

[orijonl]

its showing one bar, but if I turn off wifi, Safari will not access webpages and telephone calls always fail.

Although the sim is in and active (works on another AT&T phone) it is as if the iPhone will not utilize it.

[dandymike]

could it connect before jailbreak?
if it did restore it back to stock firmware and re-jailbreak.
it's your best option

[orijonl]

I didn't have the sim card before I jailbroke it. I guess I can restore back to original and try that.

[iPittsburgh]

^ was just about to say that. You can shift + restore to stock 3.1.3 and re-jailbreak with jailbreakme.com in safari.

[orijonl]

I don't have any shsh blobs saved for this phone. I am doing this for a friend and really just thought it was going to be a simple job. Can I go back to 3.1.3 without blobs?

[iPittsburgh]

Yes you can go back to 3.1.3 without shsh saved.

[orijonl]

Restored to 4.2.1 and phone is now working, but when trying to use data, an error is returned that states " data service is not subscribed" or something to that effect. I suppose she'll have to go in and upgrade her data plan.

[dandymike]

Yeah, update your data plan. You should be able to use redsn0w on it now and jailbreak it. The 3G jailbreak can be the easiest, good luck