I have the most updated software, but my iphone 4 battery life only last a few hours, and it dies off, after this updated version? Can I change back too the old version, it works much better on my battery.
I have the most updated software 6.1, but my iphone 4 battery life only last a few hours, can I get back to the older version, so my battery life is better?
iPhone 4, iOS 6.1
