Veronica wants to know if keeping her phone in Airplane Mode will expose her to less radiation. Leo says yes, it would. Can she also use Wi-Fi calling? Leo says it's better, but there's no evidence that it will or won't be harmful. The radiation would come from the cell phone radio, not the Wi-Fi. Using headphones instead of putting her phone up to her ear is also better.
There are a lot more studies that need to be done. It's been over ten years since we started using smartphones and there's really no statistical indication that they're causing cancer. Learn more about the findings from the National Toxicology Program here.