Nokia never executed on a touch screen OS. If i remember their final attempt with a Linux based OS was considered "good", but it was too little, too late. It was already over when they were scooped up by Microsoft, who were desperate themselves.
Pretty sure Nokia was glad to offload the handset business so they could feed money into markets they were still competitive in.
Yes they did, a few Symbian models used touch, as did original Maemo device that only did wlan initially.
https://en.wikipedia.org/wiki/Nokia_7710
https://en.wikipedia.org/wiki/Nokia_770_Internet_Tablet
All the Symbian devices used resistive touch screens, though, didn't they? E.g. the Sony Ericsson Vivaz. So the user experience was not quite the same as with capacitive touch.
No, there were quite a few Symbian models which used capacitive touch, combined with a modern Qt based Symbian OS. Check out "Symbian Belle" and the phone models released with that OS version. I loved my Nokia 603 :)
But I think they only released such models with Symbian for a couple of years, before switching to Meego and then later Windows Mobile OS.
They were in parallel, due to the whole Symbian vs Linux politics at Nokia between teams, both platforms got ramped down to Windows Phone 7 introduction and burning platforms memo.
The N900 was released more for a question of honour than anything.
It is still touch, and yes you could use finger nails as well on those models.
However you have not read the links, not all models were alike.
> The Nokia 7710 is a mobile phone developed by Nokia and announced on 2 November 2004.[1] It was the first Nokia device with a touchscreen
That isn't really true. The N9 was definitely ahead of it's time with a buttonless gesture based UI similar to the modern iPhone.