<prompt> Refer to the passage below and then answer the question afterwards in the same language as the passage: Passage: Mobile security has become increasingly important in mobile computing. Zvinonyanya kunetsa sezvo zvine chekuita nekuchengetedzwa kwemashoko evanhu zvino akachengetwa pa smartphone. Mubvunzo: Chii chine chekuita nemashoko evanhu akachengetwa pa smartphone?  <response>: Kuchengeteka kwefoni 