Very interesting activation issue for iphone 2G ...can anyone help?

So here is the story. I purchased the iPhone 2G in Nov 2008. It was carrier locked to AT&T (obviously) but using a turbo sim I was able to use it on T-mobile. I also jailbroke it. The OS version was 2.0.1

Now, since Nov 2008 I never upgraded the version because the guy who sold it to me said that if i did upgrade I would lose the unlocking that the turbo sim provides. So from Nov 2008 to today June 2011 I've been on v2.0.1.

One more important point - The original AtnT SIM that came with the phone. i lost it and do not have it.

Today, I'm not sure why I decided to connect my iphone to iTunes 10.2 and subsequenly decided to upgrade to 4.2 which iTunes proceeded to go ahead. But what iTunes did was first restore the phone to factory settings v2.0.1. When this happened, it asked for activation and I could not proceed because I do not have the original SIM with me.

So then I did some googling and the nproceeded and using the iTunes restore feature along with Tiny umbrella and restored the OS version to 4.1.2. Now, I'm stuck - I cannot activate it because i don't have the AT&T SIM. I tried the limerain, blackrain, etc. and it sjust does not complete.

I tried down restoring it to v.3.1.3, v2.0.1 - nothing. When restoring, iTunes gives an error saying that the firmware was incorrect and hence cannot restore.

So Now I'm stuck. PLEASE HELP ME!

You cant possibly have restored it to iOS 4.2 as the original iPhone does not support iOS4.

If I remember correctly the last firmware that supported the original iPhone is version 3.1.3

You can hacktivate the phone by using the last supported redsn0w or pwnagetool for that iOS version. Some googling will give you that answer.
The original SIM card is not required for any situation, so you are fine there.

To restore, put your iPhone into DFU mode and shift(windows)/option(mac) click restore in iTunes. Again google is your friend.

After that your phone will be unlocked if you have selected the BootNeuter option in redsn0w/pwnagetool, your TurboSIM is obselete and no longer required.

Quote:

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Originally Posted by exodus_xt

You cant possibly have restored it to iOS 4.2 as the original iPhone does not support iOS4.

If I remember correctly the last firmware that supported the original iPhone is version 3.1.3

You can hacktivate the phone by using the last supported redsn0w or pwnagetool for that iOS version. Some googling will give you that answer.
The original SIM card is not required for any situation, so you are fine there.

To restore, put your iPhone into DFU mode and shift(windows)/option(mac) click restore in iTunes. Again google is your friend.

After that your phone will be unlocked if you have selected the BootNeuter option in redsn0w/pwnagetool, your TurboSIM is obselete and no longer required.

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Thank you for your reply. But, that's the thing. iTunes does not show me the version. TinyUmbrella says taht the iOS version is 4.1.2. If I use Itunes to restore to 3.1.3, it just does not allow me saying the firmware is incorrect. Hence, the resnow stuff does not work. Is it possible for your to give me exact steps?

I'm 99% sure that you actually have an iPhone 3G not a 2G (it's easy to confuse the two as some people think that 2G stands for the 2nd generation iPhone - which is incorrect). What model number does TinyUmbrella report?