How much space will ios 7 take up? - 1

Iphone 4 i have 3.8 gb left how will i have left

You have asked you question in the science of Astronomy topic. You need to take ti to a tech topic

Not much compared to the size of the universe.

I am curious why you would ask a question about a phone (and you do put "phone" right in the question) in the astronomy section.