My iPhone Says 1.8 GB Free & 4.6 Used

Recentlyy iPhone 4 had been freezing and closing apps so I decided to delete my apps and all my music messages and pictures to create space. But now it only says 1.8 free. What could be taking up my space? I need at least 3.7 to update to iOS 7

Did you wait from when you deleted these apps. B/c it will change in at least 5 minutes. Other wise videos take up A-LOT of space. Go to this website for more tips: http://www.imore.com/...ival-guide

Don't upgrade to iOS 7 on an iPhone 4 unless you like terribly slow performance. If you upgrade, you will be sorry.

You could do the update through a computer & iTunes.