IPhone OTA Softer update not working?

I have an iPhone 5s. I have always used the software update feature on the iPhone since the OTA updates were added. Recently, however, I have not been able to use it because it just sits on the "Checking for Update…" screen and never does anything. I think this has been since the start of iOS 8. Has anyone else had this issue and does anyone know how to fix it. I have had to keep update my phone through iTunes and it's a big download each time and takes forever. And it still doesn't work after each restore so don't bother suggesting I restore my phone. ThanksIPhone OTA Softer update not working

Hi, I recommend just try to update it, and leave your iPhone for at least 30 minutes, if nothing happens, try calling Apple.