Sony xperia c4 dual is known as selfie phone. Because of its high resolution front camera with flash. I have bought this mobile before 1month and till now I am not facing any lag or software problem. It has a16gb memory and external memory supports upto 128gb. 2GB ram, 2ghz processor with non removable battery 2800mah.
It gives a good battery backup and phone is also very smooth. I think mobile lovers will love this sony product.