If I restore my iPhone 5, will I lose everything?

My storage is full and I remember last time I restored it, I lost everything but then it asked me to update or sync everything back on like my pictures, text messages and etc, and everything was okay and my storage cleared some space. My storage is getting full again and I want to restore but will I lose everything since I have not updated my phone to the new iOS 7? I just don't want the new layout (I know I'll have to sooner or later, but I choose later).So, if I restore, will it update my phone to the new iOS 7 and will I lose everything? Or will it not update and I'll still have everything or what?

If you restore your iPhone, iTunes will delete everything because that's what restoring the phone does. So what you can do is, you can back it up. Then, you can restore it and restore the backup into it. But if you want everything back anyway, I don't see a point in restoring it.

Yes, it will. Before you do it, backup and transfer the important data first.

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