After getting more involved with the "aftermarket" community I have this question that's been on my mind for a while now. Since rooting and flashing a custom rom on an android phone doesn't give one sim-unlock that means that the sim-lock settings must be stored somewhere else in the phone memory.
My theory goes that the sim-lock information is stored in or along with the baseband. Is this true? And if so, are there any "alternative" or "aftermarket" baseband firmware images? And finally, who makes the baseband firmware - the carrier, or the phone manufacturer?