Is it good for your health to often call for a long time at night?

Of course not. If you use a mobile phone, radiation is inevitable. It is best to answer the phone with your left ear, because people usually use their right brain more, and the right brain is more developed. If people use it as a brain to answer the phone, it will not directly affect the right brain, so it is better to answer the phone with the left ear. If you make too many phone calls at night, your brain will be in a state of excitement for a while, which is not conducive to improving the quality of sleep, so don't make phone calls for too long, or choose face-to-face communication.