Question about T-Mobile background check?

I already had 2 interviews with T-Mobile (phone and face to face) I am now in the process of waiting for my background check to come back. I have heard if you put any dates down wrong that you won't be hired. I could not remember the exact address of a couple of apartments I have had and may have the exact date of hire wrong at a couple of jobs. Will this prevent me from being hired? I have no criminal record, not even a speeding ticket, good references, I even faxed my high school diploma and my credit score is like around 620. I am just concerned about my job history and some of the dates I listed not being completely accurate??