question about using 6700 as modem

[nelly48237]

when using 6700 as a modem, is laptop computer protected from virus since we are using sprint network to surf the web? I ask this because recently the harddrive on my laptop went bad, so I put in a 15Gid harddrive that I had laying around until I could go pick up a 120gid harddrive. the problem is though it doesn't have any kind of adaware or spyware protection on it now. and due to the limited space, I don't want to download any on it to save space on my harddrive. so I was wondering if sprint had its own virus protection software on its network like AOL and others cable/DSL service does. I successfully connected to the web using my 6700 as a modem, but I'm very concerned about virus and srfing the internet without any kind of virus protection. let me know what you guys think. thanks