Which tecnology is the most valuable in your life : Oat

The most valuable technology in my life is mobile phone. It make a communication have more comfortable. It make peoples in another province, in another country or far away can talk together. It make you have more comfortable to send an emergency call. At this time mobile phone have more deverlopment. It's can be a camera when you want to take a photo, can be radio if you want to listen to music, can help you out or find the place that you want to go when you astray, can be TV. if you want to see a movie, can be a compatable games when you boring and in the future I think it can be anything you want it to be. Ican't imagine that if the world doesn't have a mobile phone,what would it be