When I type in a text thru the Messenger app it automatically changes the letter without me doing so. For instance...I commonly used the letter "U" as a shorthand for "You" like alot of people do. When I type the letter "U" and hit the space button it automatically turns it into and "I". If I do not catch this it leads to very confusing and somewhat opposite text messages from what I originally meant. How do I delete the "I" from being an automatic substitute for the "U". They are right next to each other on the keyboard so fat fingers issue is enuf to deal with already.