Frontier customer service, prepare by gathering your account information and outlining your concerns. Dial their support number and follow the prompts to connect with a representative. Remain calm and courteous during the call, clearly articulating your issue. Be patient, as wait times can vary. If possible, record important details such as the representative's name and any reference numbers provided. If your concern isn't resolved, politely ask to speak with a supervisor. Alternatively, utilize their online chat or email support for assistance. Effective communication and persistence can lead to a satisfactory resolution with Frontier's customer service.