If you own an iPhone 6s or later, an iPhone SE, or 7th generation Ipod Touch you’ll be able to enjoy the update. But..that is not such good news if you are carrying around one of the earlier modes do the iDevices.
If you have a iPhone 6 or iPhone older than 4 years old your device won’t be able to support the new iOS update. You will top off with the iOS 12 for the life of your phone.
So if you have an older phone it won’t stop working, you won’t be forced to buy a new one or face your current phone spontaneously igniting, BUT without newer updates your phone may begin experiencing performance issues and slowly drive you nuts.
Check out if the details and if you are covered here.