You can choose to use your mobile phone to get information or call from a landline, in some cases. 1  Customer Service: *611 (from mobile phone) or 1-800-922-0204. 2  Customer Service Prepaid: *611 (from mobile phone) or 1-888-294-6804. 3  Consumer Sales: 1-800-256-4646.  Business Sales: 1-800-899-4249.