Yes it will as soon as the updated information is pushed through. The units don't scan so it could end up taking a while potentially. Assuming it is happening with the analogue cut off how ever it shouldn't take long to update since DirecTV will be expecting a lot of moves then and planning for them. Some people how ever have reported problems with sub-channels taking weeks or longer to get resolved. You won't need to do anything it will be completely automatic when it does happen.