Hello so good quality in this mobile but some same quality in Samsung Galaxy S3 and Samsung Galaxy S4 like a 2GB RAM 16 GB expandable memory but the battery backup is different in the mobiles but the Samsung Galaxy S3 I think this is so fast for surfing Internet Like A U C Browser Google Play Store and anyone Internet software and the same best special processor liker Samsung Galaxy S3 and Samsung Galaxy S4 but the Samsung Galaxy S3 battery backup is normal not a big but Samsung Galaxy S4 battery backup very big anyone version in Samsung Galaxy S3 phone and different different name in different for Samsung Galaxy S3 and different different rain but now I am using Samsung Galaxy S3 i9305 thanks.!