This article was performed on an iPhone SE, in iOS 10.3.2. Completing these steps will remove the small microphone that is located to the left of the space bar in apps like Messages or Mail that use the default iPhone keyboard.
Step 1: Open the Settings menu.
Step 2: Choose the General option.
Step 3: Scroll down and select the Keyboard option.
Step 4: Scroll to the bottom of the menu and touch the button to the right of Enable Dictation.
Step 5: Tap the Turn Off Dictation button to confirm that you want to disable this setting and remove any associated stored information.
This tutorial is meant to solve the issue of the microphone to the left of the space bar in apps that use the default iPhone keyboard. In apps like Messages, Mail, and Notes, you may find that you are accidentally tapping that microphone key a lot, which opens an interface that enables the microphone so that you can dictate your message rather than type it. This can have some unexpected results if you aren’t intentionally trying to activate it, so disabling it is often a preferable alternative
Note that dictation is separate from Siri, and you can have one turned on without enabling the other. If you also find that the Siri feature on your iPhone SE is becoming a problem, then this article can show you how to disable it.
While you are on the Keyboard menu in Step 4 above, you may notice that there are a handful of other options that you can adjust which modify the behavior of the keyboards. This includes things like predictive text, spell checker, auto-correction, and more. You will find that many of the issues you encounter with your iPhone’s keyboard can be fixed by adjusting these settings.
You might also notice that the microphone doesn’t go away immediately sometimes after completing this guide. You may need to close the app by double-tapping the Home button, then swiping the app to the top of the screen.