First, you must create a baseline with your subject by conducting this test without a cell phone.

Step 1: Make sure your subject is not wearing a Bionic Band, otherwise this test will not work, as they will be strong and balanced with and without their cell phone.

Have your subject stand facing you with their feet together and one arm stretched out to their side (like they are flying). Their other arm should be bent at the elbow and the palm of their hand is touching the side of their head. Just like they were talking on a cell phone, but without the cell phone being in their hands.

Step 2: Press down on the hand of the extended arm exerting firm pressure and tell them to resist as much as they can, also have them make a mental note of how strong they are without the cell phone at their ear.

Step 3: Have them use a cell phone (either theirs or yours), however it must be actively connected to another phone. It's usually best for them to call your phone, or vice versa.

Step 4: Now have them assume the same position as before, with one arm out and the other at the side of their head, but this time have them hold the cell phone to their head as if they were talking on it. While they are doing this, repeat the identical test as before pressing down on their outstretched arm, again using force the same way you did in the baseline test. Their strength should be much less, and in most cases it will be less than half.

Step 5 (optional): Keeping your subject in the same position as Step 4, place your Bionic Band on their wrist (either one) and then press down on their arm. You will see that they have regained their strength, even while on the cell phone!

Here is a short video that shows how this tests works!

Right-click and select 'Save As' to save download video.