Gionee M2 is really a very good mobile just for its battery backup, its really amazing. It has a good quad core processor and 1gb Ram and no hanging problem while opening 2 or 3 apps simultaneously. Basic games like subway surfers and angry birds runs smoothly on it. Rear 8 MP Camera is just above average. Sound output while listening to songs or watching videos is loud enough for my likings. Call quality is also good. HD Videos runs smoothly too. So overall its a nice phone with the best battery backup.