Evaluating Mobile Phones.

You generally use a mobile phone to contact people, portably, via text or calls, mobile phones can also be used to subscribe to updates, etc.

Generally, I use a phone when i need to contact someone in a hurry, or because I need to talk to them, or in a drastic case, an emergency.

The major benefits of using a mobile phone is that they are a portable way of communicating with people. The other main advantage is that, most modern phones now act as a potable media player.

The disadvantage of a mobile phone is that they have an exponential battery, meaning that when the charge is running out, the decrease is one that is exponential, so gathering speed.
e.g. My phone will use about 60% charge in 3 days, but once its hit that 40% mark, it could go dead in an hour or 2.

It does fulfil the major purpose that it intends to provide to users, in that it provides a "mobile phone".