Is it ok to put foil and Myki in a phone case to touch on and does it affect your health or your phone?

Placing foil and a Myki card in a phone case to touch on is generally not recommended, as the foil can interfere with the card's RFID signals, preventing successful tapping. Additionally, the foil may create a barrier that could affect the phone's performance, especially if it shields signals or heat. From a health perspective, there are no significant risks associated with this practice, but it's best to keep electronic devices and payment cards separate to ensure proper functionality.