Secure remote user device unlock for carrier locked user devices

System and method of unlocking a user device. A carrier unlock request is received for a user device that may have an unlock application that has been deactivated or flashed. One or more verifications are performed to determine whether the user device is eligible for the carrier unlock requested. Upon determining that the user device is eligible for the carrier unlock, an unlock command is sent to either the user device or an alternate computing device that initiated the unlock request. The unlock command is operative to disable a comparison of a device carrier code of the user device to a subscriber identity module (SIM) carrier code stored in a SIM card of the user device. In various embodiments, the unlock command may be sent either directly to the modem of the user device via USSD or as a QR code to the alternate computing device.