Today, our smarthphones can provide enormous amount of services: Internet access, both via browsers and embedded applications (e-mail service, social media client and so on), listening to music, taking pictures...and of course, calling each other since it's a mobile phone, eventually.
Assume a world where the classic way of mobile phone communication is on the level of the...let's say, 80's. There are cellphones, but with extremely limited possibilities, making them able only to establish calls.
Is it possible that in such a world, internet and other high-tech services exist on portable devices? If yes, what can cause the constant separation of the two?
I can imagine a solution, in which cellphones are extremely cheap and simple, on the cost of functionality. But I doubt it can prevent portable device engineers to integrate it.