Will downloading iOS 7 use a lot of my cellular data?

I just got my iPhone 4 as an upgrade a week ago. As a lot of people are excited about, iOS 7 is suppose to be coming out tonight, probably in a few hours. I can say I'm kind of excited too (I never had an iPhone but I have an iPod Touch). I had to do some research and asking around about what takes up my cellular data (the internet data, not the actual usage on my phone). Downloading apps directly from your phone can take up your data so will downloading the iOS 7 do the same thing? Will it take up a lot of my data? I've already used more than a quarter of my data amount for the month so I'm trying to cut back on stuff that drains it easily.

I don't have Wi-Fi at home at the moment and I really want to download it tonight, but if it's going to take up a lot of my data then I can just wait to use the Wi-Fi at school tomorrow morning.

It will take up a lot of your data and will take a long time to download over 3g

First of all, iOS7 is NOT coming out tonight… But on September 18th. There have been cracked versions of it for months but if your talking about the actual release then it is not until the 18th. And yes if you download ANYTHING it uses data.iOS 7 will probably be a large upgrade considering how many changes are coming to it. It will take up probably at least 500mb. I would use Wi-Fi.

IOS 7 system requirements
http://www.apple.com/...whats-new/
http://techcrunch.com/2013/06/10/ios-7-leaves-older-iphones-and-ipads-out-of-the-fun/
http://www.hardwareluxx.com/index.php/news/software/operatingsystems/26674-system-requirements-for-ios-7-and-os-x-109.html

your iPhone 4 may be able to run new OS but slow, and requires 512 memory ram, and drive space for that OS, so it may be able to run but not as well as is,
also if you already have iOS 6, then it would be about the same, but some new features do not run on older iPhone models,
may be best to wait a while to find out more about other users trials on older phone,

if you do try, have original iOS installer backup, and backup syncrnized files before changing,

http://techbizze.com/blog/skylanders-autumn-stump-smash-lost-islands-ios/
.

IOS 7 comes out next Wednesday, the 18th, not before then.

And you can only update over Wi-Fi. I've tried to update using data and it won't let me.