Question about imei unlocking process

[touchdown]

Hi guys,

I am trying to learn how the process of unlocking gsm phones works. I have a pretty basic question which I hope someone here can educate me with the answer to.

Q: When entering an unlock code in phone, does the code validation process occur on the phone or on an operator server?

Or more specifically, which of the following scenarios occur when trying to unlock a phone.

A:
1. Unlock code entered in phone.
2. Phone validates the unlock code. Validation code resides in the phones ROM/firmware.
3. If validation successful, phone sends unlock request to operator server.
4. Phone is now unlocked.

or

B:
1. Unlock code entered in phone.
2. Phone sends entered unlock code and IMEI number to operator. Validation code resides server side.
3. If validation successful, operator unlocks phone. ( How would it do this? Removing IMEI number from list of locked phones?)
4. Phone is now unlocked.

or C: Something else entirelly.

Thanks!

touchdown

[Atlantis[SWE]]

1. Unlock code entered in phone.
2. Phone validates the unlock code. Phone is Unlocked in EEprom.
3. Phone is now unlocked.

You have NO simcard in phone when unlocking so it is not possible
for phone to contact any operator....

[touchdown]

Originally posted by Atlantis[SWE]
1. Unlock code entered in phone.
2. Phone validates the unlock code. Phone is Unlocked in EEprom.
3. Phone is now unlocked.

You have NO simcard in phone when unlocking so it is not possible
for phone to contact any operator....

Thanks Atlantis. However on the device I am working with you have the simcard in phone when unlocking ( required ).

Do you have any experience with the WISMO GSM module from www.wavecom.com?

I am trying to find out what type of machine code is in the WISMO firmware. It does not seem to be ARM.

Thanks again,

touchdown

[piankhi]

Hey guys I'm new. I bought a Blackberry 8320 and I need to unlock it... can u guys hellp me.... I lost all my money over the internet

[Dave.W]

old post, 2003!
:@:@:@:@:@