How to buy more iCloud storage on iPhone?

Want to buy more iCloud storage?

Go to your iPhone or iPad, Go to settings --> [YOUR NAME] --> iCloud --> Manage iCloud storage --> upgrade

Available Options:

50GB, 200GB, 2TB, 6TB, and 12TB

Note that iCloud storage – storage on Apple's servers that you use for backups and synchronization – is not the same as device storage.

You cannot get more local storage for your iPhone. It will always have the same amount of storage that it had the day it rolled off the line at the factory.