Samsung obtained a ban using Standards Essential, FRAND patents
The substance of the original ITC ban on Apple notes that Samsung offered Apple FRAND access via a standard percentage licence fee for the FRAND patents. What is unusual is that Apple refused to pay that licence fee but then did not return with a counter-offer. Apple basically refused to negotiate and continued importing products using the patents but without paying anything. Given Apple's refusal to even begin negotiating that seems evident bad faith, the ITC had no option but to decide against them
Of course, now that Obama vetoed that decision, now you have the absurd position where a hold of patents essential for the operation of a technology is not getting paid for them by a major patent abuser, and now has limited recourse. Whereas the holder of some minor design and questionable methods patents has a new import ban still standing. So thanks to Obama's protectionism, we've entered topsy turvy patent land, where essential patents become worthless, and design patents become coin.