I've got a hook up for a couple months of free sat. radio. I need to get the code though. I'm assuming there is a button sequence or something.

 

All you have to do is to change the channel to channel 0 and a number will be shown. This is the number that XM or Sirius needs in order to activate your sevice.

 

I noticed that some numbers are skipped, I guess there are not stations for every number. Will the unit just arrow to station zero. I'm having my wife do this over the phone and all she uses are the pre-sets, which I set.

 

Yes, just keep arrowing through the channels until you get to zero.