Bug 843452 - Part a-1.1: Gonk backend
Bug 843452 - Part a-1.2: Refactor radio Handler
Bug 843452 - Part a-1.3: Update data registration state
Bug 843452 - Part a-1.4: lastKnownHomeNetwork
Bug 843452 - Part b: Gonk backend IPC
Bug 843452 - Part c: Marionette tests