Trying to update iPhone 5s

[Chrome Hearts]

I'm trying to update my iPhone 5s to iOS 8.0.2, I'm currently on 7.1.2. I'm getting this error:

Yes, I did try to download iOS 8.0.2 and manually update it, but it gave me an error as well.
Help please!

 

[Damian]

Can't you just do it on your wifi?
Settings > General > Software Update

 

[Beats]

You might have to uninstall iTunes for it to work. It's most likely a problem with iTunes and it's installation files.

 

[Chrome Hearts]

@Damian it doesn't come up on my phone, and it would make me delete a bunch of stuff to have space on my phone for the iOS to download. @Beats I already uninstalled it and installed it, and it didn't do anything.

 

[Maintain]

Still need help with this? If so, LMK I can help you.