Really, you think that weather, internet, television, telephone, photography, etc. can be reprogramed and no one would notice? GPS companies would wonder why their code wasn't working. Either NASA hires super coders that remake the exact code perfectly for FE or the companies are in on it.
Your suggestion is rather ludicrous.
Reprogram them to change the way that they send communications? Why not?
Once again, the satellites can't be reprogrammed to give out information on where you are. For that to happen, the satellites would need to send out a message, receive it back from the devices, figure out where you are, and send back the changed information.
This doesn't happen. Satellites can't be reprogrammed.