In certain cases you might want to switch off iPhone’s auto-correction feature.
To disable it go to:
(iPhone) Settings -> General -> Keyboard
If you cannot see the option “Enable Autocorrection”, you will have to install the Installer.app, in order to enable third-party applications.
If you already have the Installer.app, go to:
Install -> Tweaks -> Kb application.
Install the Kb application, and look again in Settings -> General -> Keyboard for the “Enable Autocorrection” option. Set it accordingly to disable the auto-correction.
This is it!