Who invented the smart phone?

The first smart phone was the Tiantuo A6 188 mobile phone produced by Motorola in 2000.

It is the first PDA mobile phone with touch screen in the world, and it is also the first mobile phone with Chinese handwriting recognition input.

But most importantly, A6 188 adopts Dragon Ball E 16 MHz CPU independently developed by Motorola, supports WAP 1. 1 wireless Internet access, and adopts PPSM (Personal Portable System Manager) operating system.