It seems Sprint just can't catch a break lately. After the LightSquared LTE fiasco (it seems eminently likely Sprint will be forking over $65 million and have to cancel the deal), this just seems a bit like kicking the company when it's already down. Comcast has filed suit in Pennsylvania against the nation's number-three carrier, and it's for patent infringement.
Namely, Comcast alleges that Sprint is violating patents it owns covering technologies like SMS/MMS, mobile broadband cards and hotspots, as well as certain traffic routing technologies (IP/MPLS). Here are some excerpts from the complaint regarding the patents: