Battery backup is very good 16gb internal and expandable and much more overall it is for battery purpose for those use their phone daily and chatge very less their phones it is very good for them front 5 mega pixel and back camera 8 mega pixel, usually a very good phone for gamers who play for long time without charging it is 4g supported functions very well all apps hang the least can see movies at high definations quality and has latest snap dragon processor overall it is a good phone to use
Thank you