Apple has published a user guide for the Apple 12, which says not to bring the iPhone 12 close to a pacemaker, which could cause it to go into pause. It's not that you can't use the iPhone 12, only that you need to be careful to maintain a distance while using it, roughly 15 centimeters is a safe distance, and if the iPhone 12 is making use of a wireless charger, then you need to maintain a safe distance of 30 centimeters. Magnets are included in iPhone and all MagSafe accessories, and these may cause interference with some medical devices. Pacemakers use a pulse generator to deliver an electrical impulse that produces an electrical stimulus to improve heart rhythm and stimulate muscle contraction and relaxation, which can be interrupted when using the iPhone 12. Nowadays, electronic products are becoming more and more technologically advanced, bringing great convenience to people while also bringing a lot of burdens, so we must pay attention to the process of use, our safety is the first place. Once we should have also seen the cell phone with the use of the explosion, the human body caused serious injury, in the process of using the cell phone, we try not to charge to play with the phone, because charging will make the battery heat, which will have a more serious impact. But now the cell phone has been very strict in the manufacturing process, almost the impact is minimal. Through the iPhone 12 user instructions also let us understand a truth that is to remember to read the instructions, because now people are more and more trust in the phone, these are ignored, if not because of this matter made a microblogging hot search may be a lot of people did not find out, if it really caused harm to the human body that is really quite a loss. Possibly Apple will say that the cell phone has been clearly labeled, anything is still to pay more attention to their own. There are pros and cons to everything, and the fact that cell phones are becoming more and more powerful means that there are definitely many risks that we don't know about. For example, now the cell phone above with what software let us trust, do not trust can not be used, and then these apps use our information to private transactions, which is a serious violation of the legitimate rights and interests of individuals. Sometimes I personally feel that cell phones have enough features now without more new ones. iPhone 12 is a newly launched model, I think sometimes we should not rush to try new products just to catch up with the fashion, we can also look at the user's evaluation after use before making a choice. If before this someone has a heart problem really also did not pay attention to the use of the distance, to his body caused harm that to do it, life safety is the first.