dndodd: According to this old post by marchma, since an Apple LTE enabled phone, such as the 5C currently produced by Pegatron is also a 3G phone, IDCC is collecting royalties on LTE products from Pegatron and Apple would owe nothing on these particular products.
"I believe that Merritt has stated in a CC that if IDCC's existing licensees are licensed for 3G, then this would also cover any LTE products sold by a 3G licensee, as long as the LTE product was dual-mode with a licensed 3G standard."