[Q] wifi and firewall topic

hi, I just got a Galaxy note 4, I can connect to wifi everwhere but not at work. I get error that password is incorrect, I have the same password so I know my password. My stepson has a galaxy s5 and has no problem connection. I actually just returned my first phone after trying 5 days to get it connect at work. Both Comcast box and firewall have been reset. So I am not sure where to go stepson suggest change to developer operating system. I have tried safe mode, soft reset and factory reset to no luck.
This is last resort - before I return and get a different brand/model phone