LTE is a standard created by a standards body of which Qualcomm is a member. The standards body requires by contract that for things added to the standard that are covered by its members' patents, those patents are licensed under FRAND terms. This was not done here.
> “Despite having requested a license from Qualcomm, Samsung cannot sell licensed Exynos chipsets to non-Samsung entities because Qualcomm has refused to license Samsung to make and sell licensed chipsets,” Samsung said in a filing. Qualcomm didn’t immediately respond to requests seeking comment on the filings.
So it is not a price discussion or getting something for cheap, but Samsung accuses Qualcomm to refuse licensing.