Electricians may install phone jacks, but they are not typically the professionals who would do so. More likely, a phone jack would be installed by someone in the phone or cable company. However, if you are having problems with your phone line or your internet connection, it is worth calling an electrician to troubleshoot and see if there is a problem with your wiring that is affecting your service.

Generally, no. Electricians are not typically tasked with installing phone jacks in a home or office setting. That said, there may be some electricians who are also telecommunications technicians and who are capable of installing phone jacks. It would be best to ask around and see if there is someone in your area who is both an electrician and a telecommunications technician.