more power to use a bigger screen also the resolution of the screen and brightness of it can reduce the life of the battery
Bands allow the phone to be used in different countries. For example if i have a phone in England and i can only use it in England then it is 'single' band. However if it works in two different countries it is called 'dual' band and if it works in three different countries it is called 'tri' band and if it works in all counties then it is called 'quad' band.
the programs mane scours of of storage