Answer 1
Based on the results of antigravitational muscle tension studies, it can be concluded that strengthening the electromagnetic environment by carrying a smartphone or any other radio-connected device significantly worsens the tension in the antigravitational muscle chains, reflecting the nociceptive effect of the electromagnetic environment on our performance.
Answer 2
The phone stops having a harmful effect if the distance from the body is "sufficient"; the distance depends on the person and is averagely over 60 cm, but is much greater with people who consider themselves as "electro-sensitive".