Answer: Non-marketing controlled information source
Explanation:
Non-marketing controlled information source is the source that is not related with promoting agency or advertisement for providing information about any particular item , product or service.These sources are not marketing about product rather give information through personal experience, public reviews, feedback etc.
According to the question,Becky is gaining information about cell phone through non-marketing controlled information source. She is receiving information from non-marketing sources like friends review about cell phones.