During my first Internship, I was assigned to develop a Complete Real-time chat solution. I had no Past experience, the Internet but I agreed to complete. In order to develop, I browsed the Internet, but not found much. Then started brainstorming and designing as per my perception and keeping the functionality of WhatsApp in mind. Gone through Documentation of GCM(Google Cloud Messaging). With such a loose concept I started development after design and completed. Now I am experienced enough to deploy other chat systems with much more enhancement and optimizations.