An airfuel pre-mixer for a gas turbine combustor and a method of pre-mixing air and fuel for a combustor are provided. The method includes transmitting a voicemail header comprising predefined voicemail information, receiving a voicemail message content from a user of the mobile terminal, and transmitting the voicemail message content. Additionally, a solvent may be added to dissolve the asphaltenes and paraffins. Upon determining that the characters include a command, the application server automatically performs the action identified by the command across the communication network.