There could be several reasons why your son is not answering his phone when he is outside. He may be in an area with poor cell reception, his phone may be on silent or vibrate, he may be busy or engaged in an activity that does not allow him to answer the phone, or he may be experiencing technical difficulties with his phone. You can try reaching out to him through a different form of communication, such as text or social media, or you can try calling him again later. If the problem persists, it may be helpful to have a conversation with your son to understand the reason why he is not answering your calls.
