iPhone is not working

[maclove123]

Hi,

I bought a iPhone having software 1.0.2.
Then I could able to unlock it and it was working fine.

Then I connected to iTunes and asked for restore.
I restored my iPhone and the new version 1.1.1 got updated.

Now neither ATT or other SIM card is not working.
Its saying "Incorrect SIM, Insert an unlocked and valid SIM to activate iPhone"

Can you help me in getting iPhone back to my 1.0.2?
Any help would be appreciated.

Thanks!!
Maclove

[Luis]

Let me get this straight: you unlocked and then updated to 1.1.1.?

The you can go back to 1.0.2 by restoring to that version (google it) but i'm afraid that the unlock will not work again (as far as how things stand now).

[Wyvernspirit]

Hi,

I bought a iPhone having software 1.0.2.
Then I could able to unlock it and it was working fine.

Then I connected to iTunes and asked for restore.
I restored my iPhone and the new version 1.1.1 got updated.

Now neither ATT or other SIM card is not working.
Its saying "Incorrect SIM, Insert an unlocked and valid SIM to activate iPhone"

Can you help me in getting iPhone back to my 1.0.2?
Any help would be appreciated.

Thanks!!
Maclove

Oh wow, I am sorry. :(

[maclove123]

Hi,

Actually I tried to restore to 1.0.2. Still I could not able to call with ATT one.
It says the same message.

Is there anyway I can restore the modem firmware to 1.0.2 so that phone will work?

Thanks!!

[Wyvernspirit]

Hi,

Actually I tried to restore to 1.0.2. Still I could not able to call with ATT one.
It says the same message.

Is there anyway I can restore the modem firmware to 1.0.2 so that phone will work?

Thanks!!

As far as I know there isn't because apple encrypted the modem firmware to defeat this very thing so people couldn't go back to a hacked iPhone, or some such thing. Not sure I agree with their complete stance on this one, but it is what it is.

[JPyre]

If you unlocked it, and upgraded to 1.1.1, it is (so far) not possible to use it as a phone. Sorry.

If you did NOT unlock it, its quite easy to restore it with no issues. Here are the simple instructions (http://forums.macrumors.com/showthread.php?p=4274982#post4274982).