Nearly 1,500 MidAmerican Energy Co. customers were approached by telephone scammers in 2014, and 3 percent of those customers reported losing money or disclosing personal information, the utility said. Approximately half of those who lost money or disclosed personal information were small businesses, while half were residential customers. Most of the scams involve persistent callers claiming to work for MidAmerican Energy and demanding money by threatening immediate service disconnection and seeking payment by having the customer call a toll-free number resembling MidAmerican’s. Customers receiving a call threatening immediate disconnection should hang up immediately and call MidAmerican Energy customer service at 1-888-427-5632 to verify the legitimacy of the call.