The past decade has been one of constant evolution for smartphones. At the time, some large companies thought they could revolutionize the development of smartphones by introducing modular architecture. In 2013, Google announced Project Ara, a smartphone that uses a modular design. Ara is different from today's monolithic aluminum and glass phones, and users can customize it in a variety of ways because the key components are modular. In this way, users do not need to update their phones regu...