What is wrong with my IPhone? - 1

I have a 5s, and it has acted weird forever. It's run out of service randomly, not sended texts etc etc. Those problems are all gone, but now there's a new issue. Whenever I go to camera roll, it says "IPhone Storage Almosg Full. You can stop this by deleting unneeded apps, photos, videos, and music." So then I listened to this message by deleting every single ******* photo, video, and app i had, until the only thing that I had left was the undeletable apps. I also tried resetting my settings, and that worked, but it fixed everything besides that camera thing. I need someone to tell me how to fix this.

Try backing up everything to your icloud.

2 options… 1 is that it could be a broken phone. The solution is get it fixed from an apple store/phone store or at least get it checked.

2 is that you should check in settings>general>storage I believe and check the free storage. Sometimes you may have some unusable files on your phone that have come from something like iCloud or something. If its above lets say 500mb or 1GB to be sure, then it should work and it it doesn't then get your phone checked for sure