If Nokia has indeed completed designing and manufacturing the C1, there are chances that Nokia may sell its license to the phone to a third party manufacturer or may wait till Q4 of 2016 to release it in its own name.
Nokia keeping fingers crossed for ticket to smartphone party
When Nokia sold off its Lumia line of smartphones to Microsoft, it agreed not to manufacture any mobile phones until Q4 of 2016. To remain active in the space, Nokia designs the hardware and then sells the license out instead of manufacturing the phones itself. Having been effectively implemented for the N1 tablet, the strategy will continue to be implemented for mobile phones and tablets until the agreement with Microsoft runs out.
While Nokia has experimented with the Windows platform before, C1 will, arguably, be the first Nokia phone to run the Android operating system, if the rumours are true.