Disadvantages Three disadvantages There are however. also a number of disadvantages to a mobile phone. The fact that a mobile phone allows a person to be contacted at any time can in itself be a disadvantage. The perceived health risks associated with its use can be another disadvantage. Still another disadvantage is the nuisance it can cause at times when the sound of a phone ringing is irritating, such as in the classroom, during a business meeting or at the theatre. What are the disadvantages?There are, however, also a number of disadvantages to a mobile phone. The fact that a mobile phone allows a person to be contacted at any time can in itself be a disadvantage. The perceived health risks associated with its use can be another disadvantage. Still another disadvantage is the nuisance it can cause at times when the sound of a phone ringing is irritating, such as in the classroom, during a business meeting or at the theatre. Disadvantages What are the disadvantages? Three disadvantages