Cal. Rev. & Tax. Code § 41028
(a)
(2)
(b)
(c)
(e) For purposes of this section, a retail transaction occurs in the state under any of the following circumstances:
(2) If paragraph (1) is not applicable, the prepaid consumer’s address is in the state (known-address transaction). A known-address transaction occurs in the state under any of the following circumstances:
(h) The purchase in a retail transaction in this state of prepaid mobile telephony services, either alone or in combination with mobile data or other services, by a prepaid consumer is exempt from the surcharges if all of the following apply: