Voice dictation on a smart phone or tablet can be easier if you learn how to dictate instead of typing your responses or queries.
Here is an excellent article on how to dictate using your voice on an android device, iPhone and iPad.
Touch-screen keyboards can be slow, especially on phones with small screens. To enter text more naturally, you can use your phone or tablet’s voice dictation feature. Just speak — punctuation included — and your device will convert what you say to text.