Going out on a limb here, may be due to the fact that a cell phone is designed for communication and ActiPatch is designed for pain relief.
<<<<<<<<<<< never heard of a cell phone helping with pain >>>>>>>>>>>
You did read the part where ActiPatch operates at 27 megahertz vs a cell phone's gigahertz frequency, right?
The ActiPatch pulsed 27 MHz signal has been shown to have a biological effect on soft tissue cells up to 6 centimeters (2.3") deep in laboratory testing.