If you're struggling with typing speed on your iPhone, then you're not being wreckless enough. Your iPhone keyboard is smart enough to know what you intend to type. In many cases it can guess what you want to type, even when you miss a numerous keys.
Go ahead: type a sentence as fast as you can WITHOUT any concern for mistakes. Just type. You'll be surprised how many mistakes your iPhone corrected for. Typing with complete abandon and then correcting the few mistakes left is substantially faster than the frustration of typing cautiously. If you're typing with one finger you also might try typing with two fingers or two thumbs. You can gain even more speed this way. Another timesaver is to stick with one keyboard screen of the three and add punctuation and numbers later.
