If you hold your iPhone in your left hand to make calls, you might want to reconsider.
According to a recent media report, a study has shown that the way you hold the phone can affect signal strength, and that it becomes weaker when held in the left.
Some other brands are affected by different hands too, but Apple is the company that it really seems to make an impact for.
The results come from the Nordic Council of Ministers, investigating how well different phones picked up and transmitted radio signals.
Apple’s new iPhone 7, which was released this week, wasn’t part of the study.