01-28-2012 05:10 PM
this has been happening to me! early january the o button stopped working, the gradually got worseand the e and i button stopped working. Then today all of my buttons stopped working! Might try leaving it somewhere to dry but this is totally irritating!!
04-16-2013 12:05 PM
First, the "navigation button" is called a trackball. If you search for this word, you get all kinds of info.
Second, here's a link to a video that tells you how to change it.
However, I was able to fix my Curve 9300 by very gently running a push pin point around the gap between the silver ring and the face of the phone. The track ball needs to be able to wiggle parrallel to the plain of the phone face. If there's gunk in the gap, it can't do that.