new to product norton mobile

I have samsung galaxy note 2 phone and galaxy tab 2 10.1 tablet my provider is bell. I have been told not to put virus protection on mobile mobile devices? by bell tech support. My desk top and laptop both have norton protection. I am having a problem registering for the free norton mobile product. Need more info and direction these devices are transfering info (cloud, dropbox, kies etc) I am a senior with limited brain function and not a techy only stsrted using smsrt technology in dec 2012 can u help deb