before i learned i couldnt install a custom recovery until the bootloader was unlocked, i tried to install philz recovery and it didnt work, i then rebooted my phone to get out of download mode and on the splash screen was an unlocked symbol and it also said custom above android in the start up screen, then i rebooted it again the the unlocked system and the word "custom" was gone and it was back to normal boot splash screen. was this just a one time glitch or something ?