This concept is a challenge now and the maker is working on redoing the entire framework of Project Ara such that it can join all the modules together. More so, Google needs to create a phone that does not fall apart when it hits the floor. Therefore, the durability factor is something at stake here. The creators of Project Ara say that they are in process of testing the signature experience for attaching its modules. While there is no clarity on what this means we know that Ara will debut much later. There is no official launch date yet. Keep watching this space for more updates.