In order to use a new keyboard, it must first be activated in the Keyboard Manager, only then can it be selected under Standard Keyboard.
Note: This guide only shows how to enable or disable a keyboard, to use it you have to change the default keyboard.
- Open the Settings
- Tap on General
- Tap on Language & keyboard
- Tap on On-screen keyboard
- Tap on Manage keyboards
- Enable or Disable desired Keyboard
- Confirm with OK