Most iPhone users ( including myself ) touch the ?123 softkey at the bottom left corner, then we touch the desired punctuation mark and the bottom left corner key again to return to QWERTY. I learnt how to do it in a faster way. ( Hopefully ) When you touch the bottom left key, do not release it but slide your finger over to your desired punctuation mark to select. Then as soon as your finger breaks contact, the keyboard reverts immediately to QWERTY! Try it! Thoughts?