RF (radio frequency) is out there all the time. Can you pick up a radio station where you hunt? If so then RF is out there. Cell phone freq. is alot higher probably between 800-1000 MHZ, where as a radio station is like 90-120 MHZ. But the deer don't know the difference. If you can't sence it they can't either. If animals could detect RF my dog would freak out all the time.