You've come up with a reasonable fact about why phones are the best and most outstanding innovation so far. From your point of view, though I am not too certain about it being the best innovation because there are other amazing innovations out there, but for now I agree with you. The cell phone connects us to people both far and near, and it has helped humanity in diverse ways. You stated that smartphones open one up to many opportunities out there; you don't really need to go out or travel to certain places before you get informed and that alone is a plus.

Thank you so much, @cindynancy, for this.