The telephone is an amazingly useful machine, and very easy to use, but believe it or not, people don't always use them effectively. Because we're busy and focused on ourselves, we often use our phones in a manner that's helpful for us, but not necessarily for everyone else.
Hopefully you know a few of the basics, such as keeping your phone volume low, or on vibrate, resisting the urge to use them during meetings or training sessions, and of course, refraining from personal texting while at work. For personal texting, it's best to give yourself one or two times per day. You'll step away from your work, say, outside, or in a cafeteria, and then engage your personal texts.