Then she rebooted into fastboot mode: Power + Volume Down. Connected the phone to a laptop running a Linux live USB. With a single command— fastboot oem unlock —the phone asked for a confirmation on screen. She pressed Volume Up to accept.
Then she remembered an old offline tool—a specific combination of keypresses and emergency dialer codes known among repair techs. On the 5007U, during the “Welcome” screen, she pressed Volume Up for exactly 7 seconds (timing was everything), then typed *#*#4636#*#* into a hidden emergency dialer that appeared briefly before the OS fully loaded. alcatel 5007u admin lock remove