ios7

I have downloaded iOS7 update onto my pc and its in my downloads file. How do I update my iPad2 to the new OS (iOS7) by using the download ( a 1 GB file). When I try to update from my iPad, the download gets interrupted when its half way through and the update fails. That is why I downloaded the...

Any1 has iphone with IO7 running on it. I needed to test my game in it.