http://guardianlv.com/2013/09/iphone-5s-versus-samsung-galaxy-s4/

It is no surprise that Samsung and Apple are at a constant quarrel between who owns what patents; the two companies share virtually all the same value propositions, and customers. The strong competition within a market as big as the smartphone industry makes it inevitable that the two companies will overlap. As soon as an Apple customer sees technological advancements and new phone capabilities of a Samsung phone, their brand loyalty is tested. That is why Apple makes a better, and more often than not, similar technological alteration in order to compete with Samsung. This back and forth between the two businesses has lead to multiple lawsuits, most recently in South Korea, Australia and the United States. The resulting consequences of these lawsuits have lead to both iPhone and Samsung phone bans in South Korean stores. As the article states, “The Seoul Central District Court ordered Apple to remove the iPhone 3GS, iPhone 4, iPad 1 and iPad 2 from store shelves in South Korea, ruling that the products infringed on two of Samsung’s telecommunications patents.” What the future holds for Apple and Samsung is still unknown, but as long as consumers keep demanding upgrades in the smartphone sector , the patent war will continue.

http://www.aljazeera.com/business/2012/08/201282452423992519.html