Why can't I type the letter y on my phone?

You just did.

if you have a case or screen protector, there could be water or air bubble over the y

Repair of this device is straightforward, and requires screwdrivers, prying ... Iphone in upright position wont let me type letter Y at all ive tried everything Y doesnt even show up if i slide my finger across the keyboard it just skips it, and the letters ... Is there a way to do this without restoring it cause I can't reset ...