1983, Motorola's DynaTAC (Dynamic Adaptive Total Area Coverage) 8000X was the world's first commercially-released mobile phone, with a price tag of $3,995 equivalent to $8,772.59 in today's dollars. DynaTAC and Droid below, not according to scale.
Motorola spent 15 years and over $100 million developing the technology. The DynaTAC 8000X allowed 30 minutes of talk time, took 10 hours to charge, weighed 1.75 lb., and stood 13 in. high. It is fun to watch old movies and see characters use the large bulky phones and wonder how old is that. It is younger than you think.