Freeing Space in iOS I know this has been asked a zillion times and there are many search results all over the web.  However, I have never found any answer that actually fixes the problem.  

So, to restate: I have an iPhone 5C (model 1532) with 8G (says 5 available).  I'm running IOS 9.2.1.  My storage says I have 0 bytes available, and I can't do anything that changes it.  I've tried a reset (power+home).  It says I have 180M in photos, however I did go delete a bunch and the number didn't change.  I don't have iTunes, it's not connected to a PC, I don't have music or videos on it.

How can I free up space?  How can I delete files (pictures, apps) and have the system acknowledge the change?  This is seriously frustrating that I can't manage the space usage on the device.
For anyone else in this situation, I'm posting my experience.  I did install iTunes and do a backup/restore, but that didn't fix it.  It did help me see that, in fact, there was a huge chuck of data marked as "other" - this is what most forum posts describe.  I began deleting apps to see if I could figure out which was responsible, but nothing reduced that wasted space.  Finally, I was forced to accept the unpleasant reality.  Yes, you have to wipe your phone. Since I had a backup, I went to Settings -> General -> Reset (at the bottom) -> Erase All Content and Settings.  After, I used iTunes to do a restore. This brought back pretty much everything the way I had it.  However, apps that I deleted I had to search and reinstall from the AppStore.  (Why don't they have a "my apps" list like Amazon does?)