When I was in high school, my 11th grade English teacher, Mrs Davis, bless her heart, once told me, after some expository composition, "Never let the English language get in the way of what you have to say." I was surprised, especially since she was the one who handed out the grades. Later I came to realize what she meant. I believe in correct spelling and punctuation but the sense of what the author wants to say is more important.
It is easier to type on a computer than on a cell phone with 1/4" square keys. My fingers are larger than the keys. Years ago, when I had a palm pilot, it was easy to "type" with the stylis, but you can't do that now with these capacitive coupled touch screens.
Not all phones have spell/grammer check, I know mine doesn't, or at least I don't know how to use it, or it's not user friendly to use. I am more interested in what is trying to be communicated.
There IS one thing that I dislike very much, but it has made its way into the English vernacular, and that is the word "woken"; as in "they were woken up...." that word is a corruption of "awakened", as in "they were awakened by something going bump in the night."