If you’re old enough you may remember the Nokia N-Gage which was a very different mobile phone at that time as opposed to mobiles manufactured by other companies, the N-Gage was a PDA combined with a telephone and was developed from 2003-2005 and as you can see it only lasted 2 years before Nokia discontinued it.
The original N-Gage ran on the Symbian OS v6.1, but was a very different phone considering its competition and gained the nickname “Taco Phone” as according to most people it resembled a Taco (We can’t see why!).
The Symbian OS that it ran on is itself now discontinued, the N-Gage could not live up to its rival the Nintendo and was noted as a commercial failure.
It was one of the weirdest looking mobile phones and was quite something to own for the time it was developed, image is below.