Cal. Bus. & Prof. Code § 17538.9
(a) For the purposes of this section:
(b) The following standards and requirements for consumer disclosure and services shall apply to the advertising and sale of prepaid calling cards and prepaid calling services:
(1) Any advertisement of the price, rate, or unit value in connection with the sale of prepaid calling cards or services shall clearly and conspicuously disclose all of the following:
(2) The following information shall be legibly printed on the card:
(3) The company shall print legibly on the card or packaging, so that it may be read without having to open any packaging, and the retail vendor shall make available clearly and conspicuously in a prominent area immediately proximate to the point of sale of the prepaid calling card or prepaid calling services the following information, which shall be current at the time of printing and for as long as it is displayed:
(8) A company shall provide a voice prompt, immediately after a caller enters a personal identification number and destination number, that states the number of minutes for that call if the entire remaining value of the card or service were consumed in one continuous call to the dialed destination, substantially in the following form:
“You have [insert number] minutes if used up in this call.”
(9) A company shall establish and maintain a toll-free customer service telephone number that shall meet the following requirements:
(C) The telephone number shall allow consumers to lodge complaints and obtain information on all of the following:
(D) A company shall not impose any ancillary charge related to obtaining customer service, including any charge related to connecting with the customer service number or waiting to speak to a live operator.
A company offering prepaid cellular telephone services shall be deemed to be in compliance with the requirements of this paragraph if, when a request for information is made outside of normal business hours, that company provides the information requested on the next business day.