Cell Phones. Whilst we don't foresee any interference with mobile devices, the full results of interaction with mobile phones are mysterious at this time. Portable RF communications gear (one example is cellphones) need to be saved a minimum distance of 6 inches (15 centimeters) from the world with the implanted gadget. https://www.theorthopaedicandpainpractice.com/understanding-neck-pain-and-effective-treatments/