The mobile phone is placed next to the computer. If there is a text message or a phone call, the computer will cough.

When there is a telephone, the electromagnetic radiation of the mobile phone will increase, so your computer is also something that uses electricity, and the two interfere with each other electromagnetically, so this situation you mentioned appears.

Sometimes, when there are no text messages and phone calls, the computer will ring because the mobile phone is searching the network. Because the mobile or Unicom network is cellular and constantly changing, the mobile phone will always capture the best signal, so it will constantly search the network. When searching, electromagnetic radiation will also increase. If it increases to a certain extent, it will interfere with the computer, so the computer will start to ring.