If your Alcatel 4043S does not automatically prompt for a code when a new SIM is inserted, try these dialer sequences: Unlock Alcatel phone online by IMEI - doctorSIM
He spent the evening scouring archived forums and reaching out to the original carrier's automated support line. Since the device was decades old and the contract had been paid off during the Bush administration, the system finally spat out a code: 8-4-2-9-1-0-3-5 . alcatel 4043s unlock
