The purpose of this article is to review the FCC/IC Class A Digital Device parameters.
After reviewing the information above the below information could be helpful to give you an example of what it's talking about.
Any product (including your phone) that has a radio is subject to the same warning. The flip side is that most products should be immune from RF interference caused by radio transmission. Although technically the warning applies, Bluetooth and Wi-Fi are an integral part of most households and should not be a problem.
The warning is really meant for areas that may be next to a radio, television or ham radio antenna that interferes with products within a household. In this case the operator of the radio is responsible for the interference.”