How to clear all the usage on my iPhone?

I deleted everything from my phone! And I still have 4 GB of "other" but I noticed when I look in my usage it say 300kb in pictures but I have no pictures how do I clear that or get rid if "other" I seriously need help!

I downloaded iOS 7, but it won't install?

I have an iPhone 5 and I downloaded iOS 7, but it said it could not be installed at this time. I shut off my phone, turned it back on and tried again, but it still said the same thing.Am I doing something wrong?

Why is 'other' on my iphone and why is it taking up so much?

When I sync my iphone on my mac it shows me what's being used at the bottom in a bar (music, apps, photos, other). My 'other' is taking up 2/3 of the bar and I don't know what that data is from? What do I do to make that 'other' bar go down so that I can free up some room on my phone

Sound isn't working for iPhone 4?

I set my things down for a second and then came back to find my drink fell on it. It wasn't that bad and most of it wiped off of the case just fine. I tried resetting it, checked the settings, flipped the mute button. I don't really want to do the rice. It will fade in and out every couple of seconds but never stays on. Will it just fix itself?

How does the verizon share everything plan work?

Okay so i Really want a smart phone but its really expensive. But i was talking to one of my friends today, and she said she had this share everything plan with her and her familys iphone 5 and she only has to pay 20 dollars a month for her phone. She has a 16 gb iphone 5 and i don't know how it works now. Because my dad said that it would cost more to have a share everything plan. I'm so confused.

My photos and camera in settings is taking up 5GB

Okay, so when I go to settings>general>usage on my iphone I noticed that it said that my photos and camera is taking 5GB of my memory but I don't have any photos as I've deleted all of them! Any ideas to why this is happening, thanks

Added (1). It's an iphone and could someone please tell me how to fix this?