Mobile phone is the greatest invention

We live in a time, when we are surrounded by technology. Mobile phones are the most important invention ever created. Nowadays, it's impossible to imagine our life without phones. Although, about 30 years ago having an smartphone would be unimaginable.
In 21st century phone is one of the irreplaceable things.You can call to any part of the world in any time. Also you can have a video-conversation with people who far away from you. Moreover, mobile phones are important invention because people can have access to information with a click of a button. They can learn and find out about politics,weather, etc. Mobile phones have become key pieces of equipment in rescue operations. In case of accidents, the one thing you look for the first it's you're mobile as it's fastest way to get help without leaving the casualty.
Mobile phone not completely, but almost changed our world. But it's one of the most universal invention that people have created. With a lot of useful things. Therefore, in my opinion they have made a real breakthrough in communication technology.

Something like this :)