Answer:This type of learning is incidental learning.
Explanation:
What is an incidental learning?
Incidental learning can be defined as a learning that is acquired without planning to receive it or intending to receive it.
This learning occurs as we interact on a normal day or get involved in particular activities .
This learning involve acquiring information unconsciously .
Sometimes we may get involve in a formal engaging process where we don't really realise that during that process we have acquired a particular information however when a time comes to use it, it becomes accessible to us.
Trevor getting engaged in conversation with his friends was not done with a plan in mind that he will be buying a smartphone at some point , it was just general conversations during those times when they are together however it became useful when it was now the time to actual buy a smartphone.
