Not sure about Cingular/ATT, but for my T-Mobile V3, the 4-digit 'unlock
code' is originally set to 1234 and the 6-digit 'security code' is
originally set to 000000. The PIN2 code is originally set to 5678. The
'subsidy unlock code' is an entirely different item and is phone specific
and that's what you received in your email.

See 'Main Menu > Settings > Security > New Passwords' to change code or
password, and 'Main Menu > Settings > Security > SIM PIN' to turn on/off the
SIM PIN. It's described in a bit more detail in the manual.

See if it's the same for your Cingular sim, but, if not, I'd just call
Cingular/ATT ... that's what I did with T-Mobile when I ran into the same
situation and they were very helpful.
--
HTH, Fred

"catherine yronwode" <cat@luckymojo.com> wrote in message
news:tpHhi.23396$C96.16677@newssvr23.news.prodigy. net...
> What is the SIM card default unlock for a Cingular SIM card in the usa?
>
> That is, I've unlocked the subsidy from the Motorola cell phone but now I
> can't use the original Cingular SIM card in any phone? What did I do
> wrong?
>
> Here's what happened:
> 1. I called ATT/Cingular and requested a "subsidy unlock code" which was
> emailed to me a day later (see email below).
>
> 2. The ATT/Cingular instructions said I had to put a non-Cingular SIM card
> in so I put in a T-Mobile SIM card (which was working fine in another
> phone).
>
> 3. So, I popped the non-ATT/Cingular SIM card in the Motorola RAZR and the
> Motorola RAZR asked for the 8-digit subsidy unlock code which I entered
> and
> hit OK and it said it was unlocked. I made a phone call using the T-Mobile
> SIM card to prove the subsidy unlock worked.
>
> 4. HOWEVER, when I put the original working Cingular SIM card back into
> the
> Motorola phone, it then kept saying "Enter Unlock Code" where it expects 4
> digits. I tried 0000, 1245, 5678, 0123, 9999, 6666, etc (every combination
> I can think of) but I can't get past this Cingular SIM card unlock (which
> isn't the subsidy unlock).
>
> 5. In fact, when I put ANY SIM cards (T-Mobile or Cingular/ATT) into the
> now-unlocked Motorola cell phone, it says "Enter Unlock Code" and then
> when
> I enter "0000" and hit "OK" it says "Unlock Code Incorrect. Try Again".
>
> It must be in the phone 'cuz the SIM cards work find in a spare phone.
> What
> is the default unlock for the Motorola RAZR if it is not what I tried
> above?
>
> WHAT is going on?
>
> WHAT IS THE DEFAULT SIM CARD UNLOCK if it isn't the ones I tried above?
>
> catherine
>
> HERE IS THE EMAIL FROM ATT/CINGULAR (modified to obfuscate the code
> itself):
>
> Your subsidy unlock request was received and processed, see below for
> details:
>
> IMEI #: ###############
> Unlock Code: ########
>
> (To verify IMEI # press *#06#, this will poppulate a 15 digit # on the
> screen. If this sequence does not work, simply pull the back and
> battery out of phone and the IMEI will be listed on the back of the
> phone under the battery.)
>
> Caution: If this process is unsuccessful five times in a row, the phone
> will be permanently locked to the new at&t network. Do not attempt to
> enter the code more than one (1) time total. Instructions below will
> assist you in unlocking your device, if these steps are unsuccessful
> please contact us at 1-800-331-0500 or (916) 843-4685 from overseas.
>
> Motorola
> Subsidy Unlock Process
> With non-Cingular SIM inserted in device
> 1. Turn on handset
> 2. Enter unlock code when prompted
> 3. Press OK
> 4. Device should now be unlocked.