I have a special Edition-5 model I phone.i uninstalled my Facebook app but now can't installed.How can I install Facebook ap?

iOS 10.3.4 is the latest iOS version for iPhone 5c, can’t be update to a higher iOS.

For Facebook you need iOS 11 or later.

Most apps require iOS 14 or later.

Considering a newer type of iPhone?

Shafiun wrote:

I have a special Edition-5 model I phone.

No. You don't. There is no such thing.

Check in Settings>General>About.

What model phone do you have and what version of iOS is it running?

Try rebooting your phone or double tapping the home button to get rid of all the apps in the app switcher

I think he means the iPhone SE 2016 because it looks like a 5 but isn’t