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First, make sure your phone is running the latest version of the iOS operating system. If it’s not, connecting your phone to iTunes on your computer will give you a prompt to upgrade.
If your phone is upgraded, first click on the gear-shaped “settings” icon on the phone.
Within settings select “general,” then “keyboard” and then “international keyboard.
Press “add new keyboard,” and you’ll get a list of all the languages supported. Select “Cherokee,” the fourth choice.
Bring up the keyboard using any action that requires it, such as text messaging. The keyboard should now have a globe button at the bottom left. Pressing it will toggle the keyboard between English and Cherokee.