The phone of course. Everyday of the year of every month phones are being used. Without telephones the world would be complete irony. Telephones have many positive factors as well as negative ones. If you are like me, you are on the phone doing your homework, but it is hard to concentrate when you are studing about Math and talking to a friend at the same time.
Some teens take advantage of their phone privlages.
After weiging all the positive and negative factors of telephones, I came to the conclusion that phones are a great invention and are hard to live without. A world withoth telephones is living in a world with no communication. All other purposes are expressly prohibited without explicit permission.