HTC 626 bricked when trying to root the phone. What to do now?
If you have access to bootloader (fastboot), do the following:


Unlock the bootloaderGeneral command:fastboot oem unlock (Not sure for your phone)
Flash a custom recovery: CWMUse the command: fastboot flash recovery *recovery_name*.img
Download and Flash this stock ROM from CWM: CWM Backup


(Source: https://www.facebook.com/htc626gplusdev)