Nokia's weird attempt of releasing a mobile phone that doubled as a game console. Since it's games released on cartridges and were unique to the N-Gage, it certainly counts. Containing an ARM920T CPU, some unknown amount of RAM, and a 176×208 vertical screen, the N-Gage was pretty much a failure, becoming known primarily because of it's ridiculous “taco” design and it's generally botched execution. Oddly enough, Nokia claims to have sold 2 million of these things, which isn't the worst figure in the world…

https://en.wikipedia.org/wiki/N-Gage_(device)

https://tvtropes.org/pmwiki/pmwiki.php/UsefulNotes/NGage

For general information, see the Game Console Revisions Overview.

I need finishing

There are two versions of this console, arranged chronologically.