June 17th, 1946 was a Monday. On that day, the very first mobile telephone was made from 80 pounds of equipment installed under the dashboard of a delivery truck in St. Louis, Missouri. Truthfully, it would be another 30 years before you could take the first “mobile phone” anywhere without a truck.

That is, until April 3rd, 1973, when researcher and inventor Martin Cooper made the first mobile telephone call from a handheld prototype weighing 2.5 pounds. You could make a 30-minute phone call with it, but you then had to charge the device for 10 hours.

In the late 1980s, Zack Morris from “Saved by the Bell” may or may not have been carrying a DynaTAC series mobile device, one of the very first cellular telephones offered commercially. That device would have cost Zack’s parents nearly $4,000, and Zack would have had to charge it for eight hours at a time. It’s no wonder he barely used it.

The days of the telescopic antennas of the 1990s are a thing of the past. “Flip”-style form factor phones are fading from everyday view. Do you remember the early days of the Bluetooth earpiece? The first time you saw someone who appeared to be talking to themself on the street? Now it’s so commonplace you sit next to them on the bus or train—possibly “talking to yourself” as well. Now our devices are “smart;” they integrate technologies like Wi-Fi, NFC, 3G, LTE, and HSPA. A world of knowledge now rests literally at your fingertips. It has to make you wonder…what do future smartphones have in store?