Yes, you can use mobile phones. However, mobile phones may cause electrical interference with your heart device when the phone is turned on and held too close to your heart device. Also, some accessories for mobile phones contain magnets that may cause interference, such as earbuds or cases with magnetic clasps. Any effect is temporary, and simply moving the phone or accessory away will return the heart device to its previous state of operation. To avoid interference between mobile phones or accessories and your heart device, keep them at least 6 inches (15 centimeters) away from your heart device. When using a mobile phone, hold it to the ear that is farthest away from your heart device. Also, do not carry a mobile phone close to your heart device, such as in a shirt pocket.