At CES, ION will also unveil an innovative Bluetooth Cordless Phone System, the world's first home phone system built specifically for smartphones.

ENGADGET: Ion unveils cellphone accessories for home phone replacement, speakerphones

Another concerning flaw in the study's methodology was that it did not address cordless phone usage, which has been found in other studies to have a risk of tumors similar to cell phones, said Lloyd Morgan, a retired engineer and consumer advocate who has published several analyses on the phone-cancer issue.

CNN: Study fails to end debate on cancer, cell phone link