Rv mobitech phone is the Android phone that sports the latest Android 4.4 KitKat Operating system, so if you are looking for latest OS on budget, this is the one for you. This phone also has 512MB RAM, that makes it the cheapest phone with half GB of RAM. As far as the specs Rv R3 sports a 3.5-inch screen and sports a dual Sim (GSM, GSM). This is also the phone that supports micro-sim rather than a normal one. It has a 1400 mAh battery and an expandable storage of 32GB. It sports a 2 megapixel rear camera and a VGA front camera.