how to forward

I haven't found any information about how to simply forward all calls to my cell phone instead of them going to my "office phone" or "virtual phone number," or whatever it's considered. I am thinking it's not possible because surely it would be one of the first asked question. I'm very confused. I will never use the office number and i have now found out that i have messages from a month ago in the queue. i just want to bypass that number completely - people can call it but it needs to forward to my cell and there when i type in this question, nothing is at all pertinent. I hope i can do that.... thank you. Barry