u can be right... but indeed it can be a software problem too... my biggest problem is with wifi... sometimes it does connect but do not have internet access... normally rebooting fix this... and when it happen all syncrozation services (and I do use then a lot, that is why I do have a smartphone) drain the battery... I think it happen cuze I have a lot of hotspots on my phone... anyway the battery usually last for a day in a regular use... if I do not get so many calls sometimes two days...