Creativity
I got your answer but the question was that if this is the same methodology that God himself set for us and we invent the things or our free will differentiate the process.
First of all, the free will granted to us is limited. When we talk about free will in a religious perspective, we generally only refer to our independent choice in choosing right from wrong. As far as the particular issue that you alluded to about difference of functionality in mobile phones, there are lots of factors at play in addition to an individual’s free will. What the customers want, what the corporate vision is, what the marketing goals are, functionality offered by the competitors, supply of material, technical constraints, time constraints, financial and budgetary constraints, how a team collectively decides to implement a certain function – all of these and many more aspects play a crucial part in product design.