ignore the code
For example, if you type the letter «N», the next letter is unlikely to be «H», but quite likely to be «G». Accordingly, the iPhone will increase or decrease the target areas of these keys. If you type «N» and then hit the space between «G» and «H», the iPhone will assume that you meant to type «G» because «NG» is a common letter combination in English, while «NH» is uncommon (except for people living in New Hampshire)
I’ve always wondered if this was true. That’s so cool.