encapsulation vs abstraction real world example

Encapsulation is a way to achieve "information hiding" so, following your example, you don't "need to know the internal working of the mobile phone to operate" with it. You have an interface to use the device behaviour without knowing implementation details.

Abstraction on the other side, can be explained as the capability to use the same interface for different objects. Different implementations of the same interface can exist. Details are hidden by encapsulation.

Abstraction : you'll never buy a "device", but always buy something more specific : iPhone, GSII, Nokia 3310... Here, iPhone, GSII and N3310 are concrete things, device is abstract.

Encapsulation : you've got several devices, all of them have got a USB port. You don't know what kind of printed circuit there's back, you just have to know you'll be able to plug a USB cable into it.

Abstraction is a concept, which is allowed by encapsulation. My example wasn't the best one (there's no real link between the two blocks).

You can do encapsulation without using abstraction, but if you wanna use some abstraction in your projects, you'll need encapsulation.