Not enough space for photos / videos?

I have an iPhone 5 on AT&T and I'm not able to take photos or videos even though i should have enough space. It says i have used 12.7 gigs and have 803 MB left (which should be enough to take pictures anyway. I barely have an apps (i deleted almost all of them to free up space and still can't take pictures… Also. I did most of the math (i think correctly) and i'm pretty sure its nowhere near 12 gigs.

Contact at&t or go to apple.com for support

IPhones have a finite about of memory. Some of it is unusable. You may have bumped into that limit.

Videos use the most space followed by apps.

It may be that you need to send the videos to your computer or iPad

I suggest you contact your local Apple Store and ask for help

Did you recently put a MicroSD card? If yes, then change the storage back to phone in the camera app settings as it may have switched.