Be professional in the work place regardless of whether it�s your personal phone or company phone.
I agree 100%. And also, yes they can fire you if they see it. It will be treated the same as having a racy calendar or showing photos. Someone complains and your company can get in a lot of trouble.
if your worried about it, just change it while at work and change it back when you leave.. I have a "work" profile because of my email alert.. it's Mr. T saying "mail muthaf*cka" from the movie "eurotrip".. so on my work profile, it's AOL's "you got mail" audio